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Enterasys 802.11, Networking Manual

The Enterasys 802.11 product offers reliable Wi-Fi connectivity and superior performance. Ensure a seamless installation and setup process with our comprehensive Install Manual, available for free download at 88.208.23.73:8080. Get started today and optimize your wireless network effortlessly with our user-friendly and informative manual.

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Contents

iv  

2  Understanding Wireless Network Characteristics

In This Chapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-1
Wireless Network Name  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-2
Access Point MAC Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-3
RoamAbout R2 MAC Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-3
Channel Frequencies  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-4
Transmit Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-5

Auto Rate  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-6
Fixed Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-6

Communications Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-7

Signal Level  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Noise Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Data Throughput Efficiency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-8
AP Density and Roaming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-8
RTS/CTS Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-9

RTS Threshold  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-9
Hidden Station  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-10

802.11 Power Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-11

RoamAbout AP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-11
RoamAbout Client  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-11

Security  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-12

Network Operating System Security  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-12
RoamAbout AP Secure Access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-12
Wired Equivalent Privacy (WEP) Encryption  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-13
Authentication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-14
802.1X Rapid Rekeying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-16
SNMP Community Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-19
Console Port Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-19

Network Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-20
Wireless Traffic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-20

Beacons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Message Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-21
Filters  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-21

Spanning Tree Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-22

Using the Access Point 2000  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-22
Using the RoamAbout R2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-22

VLANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-23

Access Point 2000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-23
R2 Access Platform  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-23
Network Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-24

Summary of Contents for 802.11

Page 1: ...802 11 Wireless Networking Guide P N 9034042 08 E N J O Y T H E F R E E D O M O F W I R E L E S S N E T W O R K I N G ENTERASYS COM ...

Page 2: ......

Page 3: ... NETWORKS HAS BEEN ADVISED OF KNEW OF OR SHOULD HAVE KNOWN OF THE POSSIBILITY OF SUCH DAMAGES June 2002 Enterasys NetworksTM All Rights Reserved Enterasys Networks Inc 500 Spaulding Turnpike Portsmouth NH 03801 Part Number 9034042 08 Web Site http www enterasys com wireless Enterasys Enterasys Networks RoamAbout and the RoamAbout logo are trademarks of Enterasys Networks Inc Apple the Apple logo M...

Page 4: ......

Page 5: ... Wireless Infrastructure Network 1 6 Single AP 1 6 Multiple APs 1 6 Wireless Client Behavior 1 8 LAN to LAN Configuration 1 9 Point to Point 1 9 Point to Multipoint 1 10 RoamAbout R2 Configuration Examples 1 13 Restrictions 1 13 Workgroup Mode both slots Example 1 13 Workgroup Mode and LAN to LAN Example 1 14 Ad Hoc Network 1 15 Optional Antennas 1 16 Vehicle Mount Antenna 1 16 Range Extender Ante...

Page 6: ...old 2 9 Hidden Station 2 10 802 11 Power Management 2 11 RoamAbout AP 2 11 RoamAbout Client 2 11 Security 2 12 Network Operating System Security 2 12 RoamAbout AP Secure Access 2 12 Wired Equivalent Privacy WEP Encryption 2 13 Authentication 2 14 802 1X Rapid Rekeying 2 16 SNMP Community Names 2 19 Console Port Security 2 19 Network Protocols 2 20 Wireless Traffic 2 20 Beacons 2 20 Message Types 2...

Page 7: ... Mezzanine Special Considerations 3 6 Using Multiple Wireless Infrastructure Networks 3 6 Using an Outdoor Antenna 3 6 LAN to LAN Network Configuration 3 7 Ad Hoc Network 3 8 Wireless Network Hardware Installation Overview 3 9 Wireless Infrastructure Network 3 9 LAN to LAN Configuration 3 9 Ad Hoc Network 3 10 4 Wireless Network Tools In This Chapter 4 1 RoamAbout AP Manager 4 2 Installing the Roa...

Page 8: ...eters Used in a Point to Multipoint Network 5 14 Using the AP Manager 5 15 Using the RoamAbout R2 Console Port 5 16 Using the Access Point 2000 Console Port 5 17 Viewing Current AP Settings 5 18 Using the AP Manager 5 18 Using the RoamAbout R2 Console 5 18 Using the Access Point 2000 Console 5 18 Modifying the IP Address 5 19 Using the AP Manager 5 19 Using the RoamAbout R2 Console Port 5 20 Using...

Page 9: ...Console Port 5 42 Setting Spanning Tree 5 43 Using AP Manager 5 43 Using the RoamAbout R2 Console Port 5 43 Using the Access Point 2000 Console Port 5 43 Filtering Traffic by Protocols 5 44 Filtering Traffic by Addresses 5 46 Checking the Configuration on Multiple APs 5 47 Resetting the RoamAbout AP 5 48 Using the RoamAbout R2 Web Management 5 49 Configuring Clients 5 50 6 Maintaining the Wireless...

Page 10: ... Chapter 7 1 Using the AP LEDs to Determine the Problem 7 2 RoamAbout R2 LEDs 7 2 AP 2000 LEDs 7 5 AP Classic LEDs 7 8 Showing Counters 7 11 Using the AP Manager 7 11 Using the Access Point 2000 Console Port 7 11 Using the RoamAbout R2 Console Port 7 11 Displaying Error Logs 7 18 RoamAbout PC Card LED Activity in a Client 7 19 Windows Does Not Detect the RoamAbout PC Card 7 21 Client Cannot Connec...

Page 11: ...ix Contents B Connecting a Device to the Console Port C ASCII to HEX Conversion Glossary Index ...

Page 12: ......

Page 13: ... This manual describes how to design install configure and maintain a RoamAbout wireless network It also describes how to troubleshoot problems that may arise during installation or operation Intended Audience This manual is intended for the wireless network manager You should have a basic knowledge of Local Area Networks LANs and networking functions NOTE AP refers to the Access Point and the Roa...

Page 14: ...stallation Guide and online help RoamAbout 802 11 PC Card RoamAbout 802 11 PC Card Drivers and Utilities Client CD ROM Kit RoamAbout 802 11 PC Card Installation Guide RoamAbout 802 11 PC Card Drivers RoamAbout 802 11 PC Card Drivers and Utilities CD ROM Kit RoamAbout 802 11 PC Card Drivers and Utilities Setup and Installation Guide and online help RoamAbout Client Utility RoamAbout 802 11 PC Card ...

Page 15: ...The following icons are used in this document Icon Meaning CAUTION Contains information essential to avoid personal injury or damage to the equipment NOTE Calls the reader s attention to any item of information that may be of special importance NOTE ...

Page 16: ...tion of your network environment for example layout cable type Network load and frame size at the time of trouble if known The device history for example have you returned the device before is this a recurring problem Any previous Return Material Authorization RMA numbers World Wide Web http www enterasys com wireless Phone North America 603 332 9400 Europe 353 61 701 910 Asia 800 8827 2878 Intern...

Page 17: ...ration There are two variations of the RoamAbout LAN to LAN configurations Point to Point which connects two wired networks using the LAN to LAN Endpoint Bridge mode Point to Multipoint which can connect multiple wired networks using the LAN to LAN Multipoint Bridge mode Wireless clients communicating among themselves without a connection to a wired network This is called a peer to peer or ad hoc ...

Page 18: ... support existing and future radio technologies and networking requirements The RoamAbout AP provides the following basic bridging services See Chapter 2 for descriptions of wireless LAN security and management features Store and forward capability The AP receives checks and transmits frames to other LANs enabling the configuration of extended LANs Frame filtering based on address Using the addres...

Page 19: ...The RoamAbout Access Point 2000 learns addresses only from the wireless side of the network The default Aging Timer interval is 32 minutes The RoamAbout R2 learns addresses from both the wired and wireless side The default Aging Timer interval is approximately 7 minutes LAN to LAN Endpoint Bridge mode In a Point to Point configuration both APs are configured as Endpoints In this mode the AP filter...

Page 20: ...he PCI Adapter works with Microsoft Windows PC99 compliant PCs PCI slot only PCs that have BIOS supported PCI 2 2 or higher An 802 11 DS compliant radio The ability to communicate with 802 11 DS compliant APs or other 802 11 clients The RoamAbout Client Utility which allows you to monitor the quality of wireless communication Support for Windows 95 Windows 98 Windows NT Windows 2000 Windows Me Win...

Page 21: ...d Drivers and Utilities Setup and Installation Guide for setup and installation information For the latest version of the RoamAbout drivers see the RoamAbout web site http www enterasys com wireless You may need to install the appropriate networking protocols when installing the RoamAbout PC Card in the computer The most common protocols include TCP IP and NetBEUI ...

Page 22: ...ss names Each network is a separate entity Clients cannot roam between networks Multiple APs A wireless infrastructure network can consist of multiple APs This extends the coverage area of the wireless network To allow roaming each AP in the wireless network must use the same Wireless Network Name In this configuration the wireless network consists of cells A cell is a single AP and its wireless c...

Page 23: ...AP1 while maintaining LAN connectivity The capability of moving from one AP to another without losing the network connection is called roaming When a wireless client such as the laptop computer in Figure 1 1 approaches the outside boundary of a coverage area the client can sense that another AP using the same Wireless Network Name is providing a better quality signal The client then automatically ...

Page 24: ...eless networks the client could connect to an AP that is not in the network you want to join In either configuration the client automatically matches the radio channel used by the AP A wireless client configured to connect to any available network does not automatically switch networks after it makes a connection to a wireless network for example Your wireless client is configured to connect to th...

Page 25: ...ally the APs are configured with outdoor antennas If you use an outdoor antenna you should have a professional antenna installation company perform the installation Contact your Enterasys sales representative or visit the RoamAbout web site www enterasys com wireless for more information about the outdoor antenna kits Point to Point Figure 1 2 shows two APs configured as LAN to LAN Endpoint Bridge...

Page 26: ... The directional antenna allows you to increase the distance between APs There must be a clear line sight between antennas to avoid a reduction in the signal level Configuration Examples Figure 1 3 provides an example of a Central AP with six Endpoint APs The Endpoint APs can only communicate with the Central AP and not directly with each other Therefore the Central AP should be connected to the m...

Page 27: ...uration Omni Directional Antenna A5 Endpoint Mode A3 Endpoint Mode A1 Endpoint Mode Building A Multipoint Mode Central AP Area 2 Area 1 A2 Endpoint Mode A4 Endpoint Mode B5 Endpoint Mode B2 Endpoint Mode B3 Endpoint Mode B4 Endpoint Mode Building B Multipoint Mode Central AP B1 Endpoint Mode Omni Directional Antenna A5 Endpoint Mode A3 Endpoint Mode A1 Endpoint Mode Building A Multipoint Mode Cent...

Page 28: ... important to avoid Point to Multipoint configurations that will cause bridge loops A bridge loop occurs when two parallel network paths are created between any two LANs causing packets to be continuously regenerated through both parallel paths This situation eventually renders the network unusable due to the excessive traffic that is being generated by the loop The AP Spanning Tree function corre...

Page 29: ...ireless Access Platform one of the PC Cards must be connected to the Range Extender Antenna to prevent radio interference between the two cards The antenna must be placed at least two feet away from the RoamAbout R2 The 802 11 PC Cards must be at least 5 channels apart from each other Workgroup Mode both slots Example Figure 1 6 shows a RoamAbout R2 with both slots configured in Workgroup mode Fig...

Page 30: ...mAbout R2 contains two radio slots one slot configured in Workgroup mode and one slot configured in LAN to LAN Endpoint Bridge mode In addition a RoamAbout R2 can be configured for multipoint mode slot 1 only connect to an omni directional antenna and connect to other APs Figure 1 7 Workgroup and LAN to LAN Endpoint Configuration Slot 2 Workgroup Mode Slot 1 Endpoint Mode R2 Slot 2 Endpoint Mode S...

Page 31: ...ronment In Figure 1 8 Client D has a coverage area shown in gray that touches all the other clients This client can communicate with the other clients Client C s coverage area does not touch Client A These clients cannot communicate unless they move closer together The number of clients that the ad hoc network can support is determined by the network utilization of each client For example a large ...

Page 32: ...sign allows you to mount it on vehicles such as the roof of a fork lift truck to allow continuous access to networked data whether inside or outside of the building You connect the Vehicle Mount antenna to the PC Card using the special 2 5 meter 8 foot cable To connect an antenna to the PC Card insert the connector into the socket on the extended side of the PC card To protect the socket from dust...

Page 33: ...ds In this case the antenna must be placed at least two feet away from the RoamAbout R2 The Range Extender antenna has a mounting bracket and a base for vertical positioning that allows you to place the antenna on top of a table or cabinet or attach it to the wall or ceiling To connect an antenna to the PC Card insert the connector into the socket on the extended side of the PC card To protect the...

Page 34: ...t are used to connect separate LANs The directional antenna is typically used in a Point to Point wireless link The omni directional antenna is typically used in a Point to Multipoint configuration The omni directional antenna can also be used in a wireless infrastructure network Refer to the RoamAbout Outdoor Antenna Site Preparation and Installation Guide or the RoamAbout web site for more infor...

Page 35: ...rlier versions of the AP and the PC Card driver Review the Release Notes to determine if a feature is supported by your AP version and client version In This Chapter Information in this chapter is presented as follows Topic Page Wireless Network Name 2 2 Access Point MAC Addresses 2 3 RoamAbout R2 MAC Addresses 2 3 Channel Frequencies 2 4 Transmit Rate 2 5 Communications Quality 2 7 Data Throughpu...

Page 36: ...ystems like Windows XP will not see the name show up automatically in wireless LAN configuration dialogs When Secure Access is disabled users can configure clients without a network name by leaving the network name field blank or using ANY all uppercase as the wireless network name and still connect to the network Users of operating systems like Windows XP will be able to view the network name in ...

Page 37: ... the universal MAC address of a networking device RoamAbout R2 MAC Addresses The RoamAbout R2 has the following MAC Addresses allocated to it One MAC address for the wired Ethernet interface which is printed on the AP One MAC address for each RoamAbout PC Card installed in the AP which is printed on a label on the back side of the card One MAC address for the Spanning Tree This MAC address is the ...

Page 38: ...to channel 6 To avoid radio interference adjacent APs should be set to different channels that are at least five channels apart The APs do not necessarily have to be in the same wireless network For example you have three APs whose coverage areas overlap set the channels to 1 6 and 11 if possible Due to local radio regulations not all channels are available in all countries In a LAN to LAN configu...

Page 39: ...ansmissions at lower rates are usually more reliable and cover longer distances than the higher rates You might use a lower rate when the client is at the extreme edge of the coverage area see Figure 2 1 Using a lower rate covers the longer distance more reliably than a higher rate As shown in Figure 2 1 an AP can have clients using different transmit rates in a wireless infrastructure network The...

Page 40: ... interference may temporarily disrupt communications between a client and the AP After a transmission fails more than once the AP retransmits at a lower rate However the interference also prevents communication at the lower rate Retransmitting at a lower rate does not solve the problem and could decrease network performance With fixed rate enabled the AP cannot retransmit at a lower rate Using a f...

Page 41: ... Client Utility you can observe a decrease of the signal level value when you move a client away from its AP As an indicator for the communications quality signal level should always be interpreted in combination with noise level A high signal level with a low noise level provides excellent communications quality A high signal level with a high noise level results in an average or poor SNR Communi...

Page 42: ...ow setting provides maximum coverage using a minimum number of APs This option is typically used for single cell networks but also provides an efficient and cost effective solution for networks that include multiple wireless clients The coverage area ranges up to approximately 60 meters Medium The Medium setting can be used for environments where you desire clients to disassociate sooner and roam ...

Page 43: ...e receiving device includes this information as a radio silence time indicator in its CTS response message The CTS message announces to all the devices in the wireless network which device is allowed to transmit its message All other devices defer their transmissions for the radio silence time identified in the CTS message The RoamAbout AP allows you to set the RTS Threshold on the AP and to set a...

Page 44: ... in a loss of messages for both clients Figure 2 2 also illustrates that Client C is not hidden from the other clients Figure 2 2 Hidden Station Example To avoid a hidden station problem move the clients or AP if possible so that the devices can sense each other s transmissions Otherwise enable Remote RTS Threshold on the AP Do not change the RTS Threshold on the AP Enabling Remote RTS Threshold f...

Page 45: ...e this value RoamAbout Client You can enable or disable power management on a RoamAbout client With power management enabled the client goes into sleep mode to minimize power consumption The wireless traffic is buffered in the AP that the client uses to connect to the network The client checks for network traffic addressed to the client at regular intervals If there is no traffic addressed to the ...

Page 46: ...names and passwords When you follow the standard network security procedures and guidelines recommended for your network operating system an unauthorized user cannot access network data or services without the appropriate user name and password For detailed information consult the documentation that came with the network operating system or refer to the reseller of your LAN software RoamAbout AP S...

Page 47: ... client uses Key 2 to encrypt transmitted data which the AP can decipher If the AP uses Key 3 to encrypt transmitted data it cannot be deciphered by the client The Bobss key is Key 3 on the AP but Key 4 on the client Figure 2 3 Using Encryption In a wireless infrastructure network you can configure the APs to Only accept encrypted data from clients Only clients that have the correct encryption key...

Page 48: ...ervice to the user The AP acts on the response that is returned by the RADIUS Server to allow or deny the user s access to the network The AP and RADIUS Server authenticate transactions through the use of a shared secret which is never sent over the network They use the shared secret to encrypt RADIUS attributes containing passwords or other sensitive data This network security greatly reduces the...

Page 49: ...ods associated with IEEE 802 1X provide a way by which an AP can securely distribute radio keys When all of the clients on a wireless LAN use such login methods it becomes practical to use Rapid Rekeying Rapid Rekeying enhances security by frequently changing radio encryption keys reducing the time to decode and use an encryption key Hybrid Authentication Hybrid authentication is a special authent...

Page 50: ... key distribution messages Clients without session keys do not get new WEP keys EAP TLS authentication using X 509 certificates on the clients will work with Rapid Rekeying EAP MD5 password authentication will not work with Rapid Rekeying EAP MD5 does not negotiate session keys Token based authentication will work with Rapid Rekeying if the token based authentication uses a TLS based method such a...

Page 51: ...ents During this time the AP accepts transmissions on both the old and new RX keys Note that a client can only have one TX key The following table shows that some clients use Key1 as the TX key while other clients use Key 3 AP Client Key Encryption TX RX State TX RX Encryption Key1 aaaaaaaaaaaaaa RX Active TX aaaaaaaaaaaaaa Key2 bbbbbbbbbbbbb TX Active RX bbbbbbbbbbbbb Key3 cccccccccccccc Inactive...

Page 52: ...is example and repeats the process starting at step 3 AP Client Key Encryption TX RX State TX RX Encryption Key1 aaaaaaaaaaaaaa Inactive aaaaaaaaaaaaaa Key2 bbbbbbbbbbbbb Inactive bbbbbbbbbbbbb Key3 cccccccccccccc RX Active TX cccccccccccccc Key4 ddddddddddddd TX Active RX ddddddddddddd AP Client Key Encryption TX RX State TX RX Encryption Key1 eeeeeeeeeeeee Inactive aaaaaaaaaaaaaa Key2 ffffffffff...

Page 53: ...d change parameters By changing the read write community name users must enter the correct community name to modify the AP parameters The read only community name allows the management tools to view but not change the AP parameters You can change the read only name so that users must enter the correct name before they can view the AP parameters Console Port Security RoamAbout Access Point 2000 The...

Page 54: ...networking protocols can operate simultaneously with other networking protocols When you install a RoamAbout PC Card in an Apple computer you may need to install and enable Apple s Open Transport or Apple Classic network protocols along with TCP IP Wireless Traffic In addition to data wireless network traffic includes beacons and various types of messages Beacons A beacon is a message that is tran...

Page 55: ...k which can reduce unnecessary traffic and increase the network response time However filtering the wrong protocols can negatively affect the operation of the network When solving network problems you should clear all filters Address This filter forwards or does not forward traffic based on the client s MAC address Addresses Denied A client in the Addresses Denied list cannot access the LAN even i...

Page 56: ... that will cause bridge loops A bridge loop occurs when two parallel network paths are created between any two LANs causing packets to be continuously regenerated through both parallel paths This situation eventually renders the network unusable due to the excessive traffic that is being generated by the loop The AP Spanning Tree function corrects this type of problem by shutting down the port and...

Page 57: ...ng the VLAN ID is considered tagged Access Point 2000 The RoamAbout Access Point 2000 only allows or disallows the forwarding of tagged VLAN data in LAN to LAN bridge mode The AP 2000 does not support configuring the ports as VLAN members The AP does not forward VLAN data while in workgroup bridge mode R2 Access Platform The RoamAbout R2 supports the forwarding of tagged VLAN data It does NOT supp...

Page 58: ...nd Green The AP is configured to forward VLAN data Figure 2 4 Wireless Bridge Between VLANs Figure 2 5 shows a point to multipoint configuration Switch 1 connects to VLANs Red Blue Green and Purple R2 E is configured to forward data from VLAN Red to wireless endpoint R2 A VLAN Blue to R2 B VLAN Green to R2 C and VLAN Purple to R2 D This example is only valid for the RoamAbout R2 Figure 2 5 VLAN Su...

Page 59: ...ts to be Tagged Untagged or Forbidden A dynamic VLAN is created when the ports are configured via the GARP VLAN Registration Protocol GVRP which allows network devices to share their statically configured VLANs Dynamically configured VLANs are not saved A reset to the device causes the device to relearn the dynamic VLANs via GVRP The RoamAbout R2 supports both statically configured VLAN settings a...

Page 60: ...work Management Station needs to have the AP read write community name The default community name is public Refer to the Release Notes for a complete list of supported MIB objects DEC ELAN Vendor MIB IEEE 802 11 MIB DEC Extended LAN Bridge MIB IEEE 8021 PAE MIB Port Access Entity DEC Hub900 Common MIB RFC1157 SNMP Management DEC RoamAbout MIB RFC1213 MIB II Enterasys 802 1X Extensions MIB RFC1286 ...

Page 61: ...terasys Extended Switch MIB RFC2233 IF MIB Enterasys Encrypted 802 1X Rapid Rekeying MIB RFC2571 SNMP Management Framework EnterasysPrivate Enterprise MIB RFC2572 SNMP MPD Enterasys R2Management mi2 RFC2573n SNMP Notification MIB Enterasys RADIUS AUTH Client MIB RFC2573t SNMP Target MIB IANAifType MIB RFC2574 SNMP USM IEEE 802 11 MIB RFC2575 SNMP VACM IEEE 802 1X MIB RFC2618 RADIUS Auth Client MIB...

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Page 63: ...s of the AP and the PC Card driver Review the Release Notes to determine if a feature is supported by your AP version and client version In This Chapter Information in this chapter is presented as follows Topic Page Infrastructure Network 3 2 Determining the Coverage Area and Supported Users 3 3 Selecting the Location for a Single AP 3 4 Selecting the Locations for Multiple APs 3 5 RoamAbout R2 Me...

Page 64: ...e mail light utilization These factors described in the following sections help you to determine the number of APs needed Afterwards you need to examine the AP hardware requirements and the wireless client system requirements When designing a wireless network consider the security issues for your environment Security can include the following Keeping the AP in a locked closet Using the security co...

Page 65: ...65 feet 50 meters 5 5 Mbit s 230 feet 70 meters 2 Mbit s 300 feet 90 meters 1 Mbit s 375 feet 115 meters Figure 3 1 Coverage Area The faster the transmit speed the shorter the coverage area at that speed An AP with an 11 Mbit s PC Card can communicate with clients up to a distance of 375 feet in a semi open environment However only clients within the first 165 feet can communicate at 11 Mbit s Cli...

Page 66: ...as described in Hidden Station on page 2 10 If possible arrange the coverage area to minimize or prevent any two clients from being within range of the AP but out of range from each other Selecting the Location for a Single AP The AP should be placed as close as possible to the center of the planned coverage area If it is necessary to install the AP in an obstructed location use the optional Range...

Page 67: ...reas If possible have the adjacent APs whose coverage areas overlap use different channels that are at least five channels apart Be aware of potential hidden station problems If possible arrange the coverage area to minimize or prevent any two clients from being within range of the AP but out of range with each other For best placement configure the AP and a client and use the procedure in the Opt...

Page 68: ...use one network and other users to a different network This is a form of load balancing Creating a secure network for security sensitive users and a general less secure network for other users For example on a college campus you can create a wireless network that uses encryption for use by the faculty and a wireless network that does not use encryption for use by students The coverage areas of APs...

Page 69: ...earth ground Connecting of the outdoor antenna to the AP and connecting the AP to the wired LAN Refer to the RoamAbout Outdoor Antenna Site Preparation and Installation Guide for the detailed procedures to determine distances and install an outdoor configuration If you are not using an antenna the APs should be within each other s coverage area The speed you want to use for your wireless link is o...

Page 70: ...Mbit s 230 feet 70 meters 2 Mbit s 300 feet 90 meters 1 Mbit s 375 feet 115 meters The faster the transmit speed the shorter the coverage area at that speed A client with an 11 Mbit s PC Card can communicate with other clients up to a distance of 375 feet in a semi open environment However only clients within the first 165 feet can communicate at 11 Mbit s Clients between 165 and 230 feet communic...

Page 71: ...s clients by installing the RoamAbout PC Card into the appropriate computers Refer to the RoamAbout PC Card documentation 5 If installing the RoamAbout Client Utility recommended see the RoamAbout Client Utility on page 4 7 6 Configure the wireless clients using the procedures described in the RoamAbout 802 11 PC Card Drivers and Utilities Setup and Installation Guide LAN to LAN Configuration The ...

Page 72: ...Create wireless clients by installing the RoamAbout PC Card into the appropriate computers Refer to the RoamAbout PC Card documentation 2 If installing the RoamAbout Client Utility recommended see the RoamAbout Client Utility on page 4 7 3 Configure the wireless clients as described in the RoamAbout 802 11 PC Card Drivers and Utilities Setup and Installation Guide ...

Page 73: ...About R2 only Web Management RoamAbout R2 only Network Management Station NMS To configure the AP for the first time you need to use the RoamAbout AP Manager or the console port In This Chapter Information in this chapter is presented as follows Topic Page RoamAbout AP Manager 4 2 Other SNMP Management Tools 4 5 RoamAbout Console Port 4 5 Telnet 4 6 Web Management 4 6 RoamAbout Client Utility 4 7 ...

Page 74: ... parameters such as statistics firmware version number MAC addresses amount of memory and card type Integrity checking for many wireless parameter changes This warns you if a common wireless network management mistake is about to be made or if the operation requested is unusual and usually not recommended Integrity checking of an existing wireless network configuration for consistent settings and ...

Page 75: ...wired LAN as the AP to assign an IP address or upgrade the AP firmware The AP Manager is included on the CD ROM in the RoamAbout AP kit and can also be downloaded from the enterasys com wireless web site To install the AP Manager follow the installation instructions After the installation you can open the AP Manager main window shown in Figure 4 1 by clicking the Start button on the Windows deskto...

Page 76: ...ist field on the main window see Figure 4 1 You can add or remove APs from the configuration file The following lists some of the actions you can perform from the AP Manager main window Each time you open the AP Manager the RoamAbout AP Managed List field is blank You need to open a file by clicking File in the menu bar selecting Open and choosing a configuration file All the APs in that group are...

Page 77: ...ty names that allow SNMPv1 and SNMPv2c read only and read write access to an NMS The names are disabled by default with the exception of Community Name 1 which is set to public If using SNMPv3 you should leave names 2 through 4 disabled The following AP settings are only accessible from an NMS RMON parameters Aging timer RoamAbout Console Port You can manage the AP by connecting a terminal or pers...

Page 78: ... set to use the arrow keys Web Management You can manage the RoamAbout R2 through your web browser However you must first assign the R2 an IP address Refer to Appendix B for the procedure to connect a device to the AP console port The RoamAbout R2 web management runs on the following browsers Netscape Communicator V4 5 V4 6 V4 7 and V6 0 and later Microsoft Internet Explorer V4 0 and V5 0 and late...

Page 79: ...mmunications quality of the RoamAbout PC Card in more detail It allows you to investigate the performance of the RoamAbout radio link between Your computer and another wireless computer Your computer and the current AP Perform a Site Survey running the Site Monitor option Use the Site Monitor mode to display the communications quality of your computer with multiple APs in its vicinity The Site Mon...

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Page 81: ...ings For infrastructure and ad hoc networks document the common settings for any clients that join the network at a future date In This Chapter Information in this chapter is presented as follows Topic Page Configuring APs in an Infrastructure Network 5 3 Configuring APs in a Point to Point Network 5 8 Configuring the AP for Point to Multipoint 5 13 Viewing Current AP Settings 5 18 Modifying the I...

Page 82: ...ree 5 43 Filtering Traffic by Protocols 5 44 Filtering Traffic by Addresses 5 46 Checking the Configuration on Multiple APs 5 47 Resetting the RoamAbout AP 5 48 Using the RoamAbout R2 Web Management 5 49 Configuring Clients 5 50 Topic Page ...

Page 83: ...the correct community name you cannot modify the AP or add it to an AP Manager group For a RoamAbout R2 the SNMPv3 Authentication and Privacy Passwords default for both is password Identification information such as a unique name for the AP its location and the name of the person responsible for the AP Wireless Parameters Used in an Infrastructure Network If adding APs to an existing wireless netw...

Page 84: ...arded by the AP to the wireless LAN You should use the lowest speed that you want to support If using applications that use multicast traffic for example IGMP you can increase this rate from the default of 2 Mbit s Fixed IntraBSS Relay Enable Allows wireless users associated with an AP to see and communicate between each other This is accomplished by taking a multicast packet from one wireless use...

Page 85: ... to load Afterwards the AP Manager displays the Identification and Wireless Parameter dialog boxes 5 Identification Enter information that will help administrators identify the AP 6 Wireless Parameters Enter the wireless parameters for your wireless network If your wireless network requires additional settings click the Advanced button 7 Click OK 8 To implement your changes R2 AP Select Reset from...

Page 86: ...ed This sets the speed of the wired Ethernet connection The default setting autonegotiate works well in most environments GVRP Set to Disabled unless you are configuring the AP to support VLANs as described in Configuring for VLANs on page 5 40 CDP This setting is Disabled by default in Workgroup mode To change this setting refer to Setting the Cabletron Discovery Protocol on page 5 21 2 Choose Sa...

Page 87: ...miting Set to Disabled to disable the 100 Kbit sec limitation on multicast traffic 6 Optionally you can enable console security as follows a Choose Enable Disable Console Password from the Installation Menu Enable Console Password to prevent other users from using the console port to view or modify settings b Select Set SNMP Read Write Community from the Installation Menu Enter a new community nam...

Page 88: ...ss Depending on your network configuration you may also need to provide the subnet mask and default gateway The AP SNMP read write community name default is public If you do not enter the correct community name you cannot modify the AP or add it to an AP Manager group For a RoamAbout R2 the SNMPv3 Authentication and Privacy Passwords default for both is password Wireless MAC address of each AP The...

Page 89: ...ify the location of the AP Each AP should have a unique station name Bridge Mode Set to LAN to LAN Endpoint Remote Wireless MAC Address Enter the wireless MAC address of the remote AP Transmit Rate A fixed rate is recommended for most environments See Transmit Rate on page 2 5 RTS Threshold The default setting works well in most environments See RTS CTS Protocol on page 2 9 Spanning Tree Set to En...

Page 90: ...pted You may need to wait a few minutes for the IP address to load Afterwards the AP Manager displays the Identification and Wireless Parameter dialog boxes 5 Identification Enter information that will help administrators identify the AP 6 Wireless Parameters Enter the wireless parameters for your wireless network Click the Advanced button to view all wireless parameters 7 Click OK 8 To implement ...

Page 91: ... wired Ethernet connection The default setting autonegotiate works well in most environments GVRP Set to Disabled unless you are configuring the AP to support VLANs as described in Configuring for VLANs on page 5 40 CDP This setting is Auto Enabled by default in LAN to LAN mode To change this setting refer to Setting the Cabletron Discovery Protocol on page 5 21 2 Choose Save 3 Choose Wireless Con...

Page 92: ...t Remote Wireless MAC Address Enter the wireless MAC address of the remote AP Spanning Tree Mode Set to Enabled or Disabled For more information see Spanning Tree Protocol on page 2 22 6 Optionally you can enable console security as follows a From the Installation Menu choose Enable Disable Console Password Set to Enable b Select Set SNMP Read Write Community from the Installation Menu Enter a new...

Page 93: ...ont of the Access Point 2000 and on the side of the RoamAbout R2 Valid unused IP address Depending on your network configuration you may also need to provide the subnet mask and default gateway The AP SNMP read write community name default is public If you do not enter the correct community name you cannot modify the AP or add it to the AP Manager group For a RoamAbout R2 the SNMPv3 Authentication...

Page 94: ...vation key Remote Wireless MAC addresses Central AP Enter the wireless MAC addresses of the other APs Any unused fields must be null contain no characters Endpoint APs Enter the wireless MAC address of the Central AP Wireless Relay Central AP Access Point 2000 only Enable to allow the endpoint APs to communicate with each other through the Central AP or Disable to only allow the endpoint APs to co...

Page 95: ...ress to load Afterwards the AP Manager displays the Identification and Wireless Parameter dialog boxes 6 Identification Enter information that will help administrators identify the AP 7 Wireless Parameters Enter the wireless parameters for your wireless network Click the Advanced button to view all the wireless parameters When configuring the Central AP click the LAN to LAN Multipoint Properties b...

Page 96: ...ddress on page 5 19 Ethernet Speed This sets the speed of the wired Ethernet connection The default setting autonegotiate works well in most environments GVRP Set to Disabled unless you are configuring the AP to support VLANs as described in Configuring for VLANs on page 5 40 CDP This setting is Auto Enabled by default in LAN to LAN mode To change this setting refer to Setting the Cabletron Discov...

Page 97: ...tions from the Module Specific Options menu and continue entering the wireless parameters 6 Optionally you can enable console security as follows a From the Installation Menu choose Enable Disable Console Password Set to Enable b Select Set SNMP Read Write Community from the Installation Menu Enter a new community name 4 to 31 printable ASCII characters Users must enter the community name to acces...

Page 98: ...er the next reset are displayed Using the RoamAbout R2 Console Choose Current Configuration from the Main Menu to view the network and hardware parameters To display the current wireless settings choose Wireless Configuration in the Main Menu then choose Set Show Wireless Configuration If you have changed a wireless parameter but not yet reset the AP the new setting is NOT reflected in this displa...

Page 99: ...lt gateway select the AP from the Managed List field and click the Network Parameters button A reset is not needed To change the AP s current IP address using BootP or DHCP perform the following 1 Select the AP from the Managed List field 2 Click the Network Parameters button and set the following parameters Address State Set to Volatile The address state options are inactive if this parameter was...

Page 100: ... IP Address message 9 In the Load IP Address dialog enter the wired MAC address new IP Address and other parameters as necessary 10 Click OK 11 If a message appears about reloading an R2 click OK to close the message and continue loading the new address Using the RoamAbout R2 Console Port 1 Choose Network Configuration from the Main Menu and enter the following parameters IP address If manually en...

Page 101: ...ron Discovery Protocol CDP allows other devices Cabletron Enterasys with CDP to discover the RoamAbout R2 in the network topology Auto enabled the default setting The RoamAbout R2 sends out one CDP packet at startup and only transmits further CDP packets after receiving CDP packets from another device Enabled The RoamAbout R2 always sends out CDP packets Disabled The RoamAbout R2 never sends out a...

Page 102: ...llisions You can also use the AP Manager by selecting Integrity from the menu bar then selecting Link Test Remote RTS Threshold Should only be enabled to address a hidden station problem as described in RTS CTS Protocol on page 2 9 This parameter is only available on a RoamAbout R2 in Workgroup bridge mode DTIM This is the only configurable AP Power Management parameter It is only available when t...

Page 103: ... bridge mode This setting is always enabled on the AP 2000 firmware V6 04 or higher Wireless Relay Enable to allow the endpoint APs to communicate with each other through the Central AP or Disable to only allow the endpoint APs to communicate with the Central AP and its wired LAN This feature is only available on an Access Point 2000 managed by the AP Manager when the AP is in Point to Multipoint ...

Page 104: ... network with the proper encryption keys You can also use encryption in a LAN to LAN configuration and ad hoc networks to enhance security Setting Secure Access Secure Access only applies in a wireless infrastructure network This parameter is only available at the AP When Secure Access is enabled the AP denies access to wireless clients that do not use the correct wireless network name When Secure...

Page 105: ...2 Key 3 and Key 4 The position of each key is important since all the wireless devices must enter the same key in the same position to decipher encrypted data Using the AP Manager To configure encryption using the AP Manager perform the following 1 In the main window select the AP in the Managed List 2 Click the Encryption button Selected Slot RoamAbout R2 only 1 or 2 Enable Encryption Enable add ...

Page 106: ...ct encryption keys can participate in this network Disable to accept encrypted data from clients with encryption enabled and unencrypted data from clients without encryption enabled This allows clients who require security to use encryption without preventing other clients from using the network Transmit Key ID Select the Key number that you want the RoamAbout R2 to use when transmitting data Rese...

Page 107: ...ructure network Enable to only accept encrypted data from clients Only clients that have the correct keys can participate in this network Disable to accept both encrypted and unencrypted data from different clients This allows clients who require security to use encryption without preventing other clients from using the network Set Encryption State Enable encryption 3 To prevent any management too...

Page 108: ...d information RoamAbout R2 Console Port The following security settings are available from the console port Access to the console requires a password The username is admin and the default password is password The password must be a minimum of eight ASCII characters and is case sensitive The same username and password is used for Telnet and web management To change the password choose Serial Telnet...

Page 109: ...ad only access to the full MIB view Community Name 4 Allows read write access to the full MIB view To disable a Community Name enter disable and the community name number in the field For example enter disable2 in the Community Name 2 field Perform the following to change the community names 1 Choose Security and Policy Configuration from the Main Menu 2 Choose Communities 3 To only have the RoamA...

Page 110: ...cator that encrypts the SNMP Objects used between the AP Manager and the Access Point 2000 for management of critical RADIUS client parameters You can enter a custom RADIUS Management Authenticator or use the AP s default RADIUS Management Authenticator The Management Authenticator can be changed at anytime Using the AP Manager To enter a custom RADIUS Management Authenticator on the Access Point ...

Page 111: ...2 Enter the RADIUS Management Authenticator password in the Old Password field 3 Enter the new password in the New Password field and in the Confirm New Password field 4 Click OK Using the Access Point 2000 Console Port To enter a custom RADIUS Management Authenticator using the console port perform the following 1 Choose Module Specific Options from the RoamAbout AP Installation Menu 2 Choose RAD...

Page 112: ...are 1812 default and 1645 This value must match the secondary RADIUS Server configuration if used Shared Secret The text string that ensures that the data exchanged between the server and the AP is valid The shared secret must match the corresponding entry for the AP in the RADIUS Server database Retry Limit Valid range is 0 to 20 times Default is 5 Retry Timer Number of seconds between retries Va...

Page 113: ...1 Click on the Authentication button in the RoamAbout AP Manager main window Selected AP Select the AP that you want to configure for authentication Authentication Options Choose the slot slot 2 is for RoamAbout R2 only and the type of authentication MAC or 802 1X For hybrid authentication choose both 802 1X Activation Key AP 2000 only Enter the alphanumeric activation key dialog appears when you ...

Page 114: ...ntication Mode Choose MAC 802 1X or Hybrid MAC and 802 1X 6 If 802 1X or hybrid was selected enter the 802 1X parameters Optionally configure Rapid Rekeying See Configuring for Rapid Rekeying on page 5 36 7 Choose Save 8 If you enabled MAC or 802 1X authentication perform the following to implement your changes If only changing RADIUS or 802 1X parameters a reset is not needed a Choose Reset Upgra...

Page 115: ...es MAC address authentication Disables 802 1X authentication 802 1X Authentication Enables 802 1X authentication Disables MAC address authentication and Rapid Rekeying 802 1X Authentication with Rapid Rekeying Enables 802 1X authentication and Rapid Rekeying Disables MAC address authentication Hybrid 802 1X MAC based Authentication Enables both 802 1X and MAC address authentication Disables Rapid ...

Page 116: ...bled to use the same encryption key for both transmit and receive Using the AP Manager To set up Rapid Rekeying using the RoamAbout AP Manager perform the following steps 1 Click on the Authentication button in the AP Manager main window 2 Select the AP from the drop down list 3 Select Rapid Rekeying Slot 1 or 2 802 1X should already be selected 4 Click the 802 1X Parameters button 5 Enter the Rap...

Page 117: ... Authentication Options 3 Choose Configure Wireless Authentication Type 4 Choose 802 1X Authentication with Rapid Rekeying 5 Enter the 802 1X activation key then enter the 802 1X parameters as described in Configuring the AP for Authentication on page 5 32 6 Choose Configure Rapid Rekeying Parameters from the Authentication Options menu 7 Enter the Rapid Rekeying parameters 8 Choose Save There is ...

Page 118: ...ol Panel open Network Connections then open the Wireless Network Connection RoamAbout 802 11 DS 3 In the Wireless Network Connection Status window click on the Properties button 4 In the Wireless Connection Properties window click on the Wireless Networks tab 5 If the Wireless Network Name you want to configure is in the Preferred Networks field of the Wireless tab shown below click on the name th...

Page 119: ...ies window shown below select the following a Check the box marked Data encryption WEP enabled b Check the box marked The Key is provided for me automatically c Un check any other checked boxes d Click OK to apply the changes 7 Click OK or Close to close all open windows ...

Page 120: ... however the port removes the VLAN ID from the outgoing frames This feature should only be used when the transmitting port is connected to a device in the network that does not support VLANs Forbidden The port does not forward any data from a defined VLAN None The port does not forward any data from a defined VLAN default setting This setting can only be configured manually and can be overridden b...

Page 121: ...nine option R2 Slot 2 if the slot is in LAN to LAN Endpoint mode Using the AP Manager Click on the VLANs button in the main window Refer to the RoamAbout AP Manager online help for more information A reset is not needed to implement VLAN changes To create a VLAN RoamAbout R2 only 1 Click the Create VLAN button VLAN ID Enter the ID of the VLAN The R2 supports VLAN IDs 2 2047 VLAN Name Enter the nam...

Page 122: ...cast Groups folder Using the RoamAbout R2 Console Port The R2 console port Telnet interface does not support configuring VLANs However you can enable or disable GVRP as follows A reset is not needed to implement VLAN changes 1 Choose Network Configuration from the Main Menu 2 Enable or disable GVRP 3 Choose Save Using the Access Point 2000 Console Port A reset is not needed to implement VLAN chang...

Page 123: ...n window Select Reset Slot x where x is the slot 1 or 2 you configured AP 2000 Select Reset from the main window Select Reset with Current Settings Allow approximately one minute for the AP to reset and complete its self test Using the RoamAbout R2 Console Port Choose Network Configuration from the Main Menu Enable or disable Spanning Tree To implement the change select Reset Upgrade from the Main...

Page 124: ...t need to be reset If you select one or more protocols the AP Manager applies those changes to ALL of the APs selected in the Managed List field in the main window The AP Manager prompts you for confirmation before changing the parameters on multiple APs Table 5 1 Protocols to Filter Protocol Description IP V4 Does not forward IP version 4 packets carried in Ethernet V2 frames or IEEE 802 3 frames...

Page 125: ... 802 3 frames with LLC SNAP headers Used primarily in Apple native networking VAXcluster Recommended if there are no VAXclusters on the wireless LAN 802 3 ISO Connectionless DSAP Recommended if there are no ISO wireless clients on the wireless LAN LAN Traffic Monitor Recommended if there are no bridges on the wireless LAN DECnet End Node Hello Recommended if there are no DECnet routers on the wire...

Page 126: ...d in the Addresses Allowed List This filter is essentially ineffective when also using authentication To set the filters using the AP Manager perform the following steps 1 Click on the Filtering button in the main window to access the Filtering Dialog Box 2 Click on the Address tab 3 For a RoamAbout R2 select the slot 1 or 2 4 Select Addresses Denied or Addresses Allowed from the drop down list an...

Page 127: ...that all APs are configured with the following Same bridge mode Same wireless network name Different station name Same AP Density setting Same transmit rate Same Secure Access setting Same RTS Threshold Same rate limiting setting AP 2000 only Same upline dump setting AP 2000 only Same forwarding setting Values not used in LAN to LAN mode are not checked when the AP is in LAN to LAN mode The Firmwa...

Page 128: ... the AP from the Managed List field click the Reset button then click the Reset with Factory Defaults button From a device attached to the RoamAbout R2 console port select Reset Upgrade from the Main Menu then select Reset Switch with Factory Defaults From a device attached to the Access Point 2000 console port select Reset with Factory Defaults from the RoamAbout AP Installation Menu Hardware Rel...

Page 129: ...sword The default username is admin and the password is password The RoamAbout AP Manager management tree appears 3 Click on the Network Configuration web page then the Network Parameters web page 4 Enter the IP Address Subnet Mask and the Default Gateway 5 Click on Save 6 Click on the Identification web page 7 Enter the text to describe the RoamAbout R2 8 Click on Save 9 Click on the Wireless Par...

Page 130: ...ts To configure the clients refer to the RoamAbout 802 11 PC Card Drivers and Utilities Setup and Installation Guide and the client online help Check the enterasys com wireless web site frequently for client upgrades and documentation revisions ...

Page 131: ...of users increase In addition you should regularly check the RoamAbout Wireless web site for product updates In This Chapter Information in this chapter is presented as follows Topic Page Testing Radio Communications Quality 6 2 Optimizing RoamAbout AP Placement 6 5 Optimizing RoamAbout Outdoor Antenna Placement 6 7 Logging Measurement Data 6 8 Checking the Client RoamAbout PC Card 6 9 Monitoring ...

Page 132: ...r the remote APs in a LAN to LAN configuration 5 Choose the client or AP to test the signal quality then click the Start Sampling button to start the test To stop the test click the Stop Sampling button 6 Check the signal level and noise level if the Signal to Noise Ratio SNR is low between the AP and the other wireless device If the signal level is low the devices may be too far apart or there ar...

Page 133: ...ssociated AP If you are configured for an ad hoc network you can select another client in the network to be the test partner then select the Test Results tab 3 Check the Signal to Noise SNR indicator which changes color according to the communications quality as follows Green green color Communications quality is good Yellow yellow color Communications quality is adequate Optionally click the Advi...

Page 134: ...rom a source of noise interference If the SNR is adequate or good but there is a relatively large number of messages lost or received after a retry the problem might indicate A very busy network where many clients try to access the medium at the same time A microwave oven in close vicinity 7 to 10 feet to the client or AP is causing short bursts of interference This noise might not be displayed by...

Page 135: ...reless network the Client Utility can help determine where the coverage areas overlap You may need to use these tools after you initially install the APs and on a regular basis to determine if the coverage areas change due to new obstructions or new sources of radio interference Using the Client Utility Use the RoamAbout Client Utility Site Monitor window to monitor the radio communications qualit...

Page 136: ...e AP Name and add it to the table A low signal level indicates that the APs may be too far apart Relocate or add APs to create a contiguous wireless coverage area where communications quality is Adequate or better If the noise level is high walk through the area monitoring the Noise Level indicator to determine the location of the source of interference If possible switch off the source of interfe...

Page 137: ...Ps that both use directional antennas you may need one person at each antenna and a method to communicate with those people 1 Select the AP from the Managed List field in the AP Manager main window 2 Click on the Integrity drop down menu and select Link Test 3 Under Remote Station Info in the Link Test window click the down arrow to list the available APs in the LAN to LAN configuration 4 Choose t...

Page 138: ... measurements which may help you investigate the performance of your wireless LAN over a period of time Send the measurement results to your RoamAbout support representative when troubleshooting a specific problem The Client Utility allows you to log measurement data manually or automatically at regular intervals To set the logging options click the Log Settings tab in the Site Monitor or Link Tes...

Page 139: ...rd diagnostics are listed under the self test fields Click on the Generate Report button to create a log file of the wireless network card components and system settings of your computer If you need to contact RoamAbout technical support the card test results may help the support representative determine the cause of a malfunctioning device In exceptional cases you may lose your network connection...

Page 140: ...not change or view the RMON group settings When the AP is initialized two statistics groups are generated One group is for the wired interface and one is for the wireless interface Also two History groups are generated for each interface One group has a short term polling period of 30 seconds and one has a long term polling period of 30 minutes The AP 2000 has the following limits for the RMON MIB...

Page 141: ... Choose Module Specific Options from the RoamAbout AP Installation Menu 2 Choose Authentication Options 3 Choose Monitor RADIUS Client Operation The menu options are List RADIUS Client Statistics Displays the AP RADIUS counter information List RADIUS Client Parameters Displays the AP RADIUS configuration List RADIUS Client Statistics and Parameters Displays the AP RADIUS parameters and counter inf...

Page 142: ...Response packets received from the server Malformed packets include packets with an invalid length Malformed packets do not include bad authenticators signature attributes or unknown types Bad Authenticators Number of RADIUS Access Response packets containing invalid authenticators or Signature attributes received from the server Pending Requests Number of RADIUS Access Request packets destined fo...

Page 143: ... port select Show Current Settings from the Installation Menu The top line contains the firmware version SW Vx x Using the RoamAbout R2 Console Port To check the RoamAbout R2 firmware version using the console port choose Current Configuration from the Main Menu Using the Client Utility To check the versions of the RoamAbout PC Card Driver and Station Firmware in a RoamAbout client run the RoamAbo...

Page 144: ...d to load the AP you might load an incorrect image You can only upgrade one AP at a time When you start the upgrade the AP immediately stops its operation Using the AP Manager To upgrade the AP using the AP Manager click the Reload Now button and follow the on line instructions The NetRider Loader utility loads the new firmware The upgrade takes a few minutes during which the AP is unavailable You...

Page 145: ...he image file is stored Download Type Select Application if upgrading the AP firmware or Boot ROM if upgrading the BootROM 5 Choose Apply You are asked to confirm the upgrade Using the AP Hardware Reset Button The AP hardware Reset button labeled as S1 on the unit forces the AP to download a firmware image and reset to factory default values Use the Reset button when you are unable to reload or up...

Page 146: ...es not support encryption To change the PC Card in an AP configured for a wireless infrastructure network you only need to remove AC power replace the PC Card and power on the AP To change the PC Card in an AP configured for a LAN to LAN network perform the following 1 Remove AC power 2 Replace the PC Card 3 Power on the AP 4 Change the wireless MAC address on each remote AP configured to communic...

Page 147: ...hapter Information in this chapter is presented as follows Topic Page Using the AP LEDs to Determine the Problem 7 2 Showing Counters 7 11 Displaying Error Logs 7 18 RoamAbout PC Card LED Activity in a Client 7 19 Windows Does Not Detect the RoamAbout PC Card 7 21 Client Cannot Connect to the Network 7 21 Checking the Network Protocols on a Windows System 7 22 Device Conflict on a Windows System 7...

Page 148: ... the LEDs on the AP 2000 and the original release of the AP Figure 7 1 shows the RoamAbout APs Figure 7 1 RoamAbout APs RoamAbout R2 LEDs Table 7 1 describes the function of each LED Error conditions cause the LEDs to turn on off or blink in a pattern Table 7 2 describes the LED patterns Access Point 2000 R2 Wireless Access Platform 1 1 2 Access Point Access Point Classic ...

Page 149: ...port slot 1 Wireless LAN Activity on the RoamAbout R2 Slot 1 Slot 2 Blinks indicating activity when packets are Received on the wireless port and forwarded to the Ethernet port Received on the Ethernet port and forwarded to the wireless port Addressed to or generated by the RoamAbout R2 using the wireless port L Lights indicating a link connection to the wired Ethernet port A Flashes when there is...

Page 150: ...ern continues to display contact technical support Normal operating mode RoamAbout R2 is waiting for the Spanning Tree No action is required RoamAbout R2 is occasionally saturated No action is required Cannot communicate with the wireless network Verify that the PC Card is properly inserted Cannot communicate with the wired network Verify that the Ethernet cable is properly connected On Off Consta...

Page 151: ...om the Ethernet to the wireless side due to the lower throughput of the wireless network The degree of LED brightness indicates the level of saturation The LED dims and eventually extinguishes as the network congestion is processed Wireless LAN Activity Lights when packets are Received on the wireless port and forwarded to the Ethernet port Received on the Ethernet port and forwarded to the wirele...

Page 152: ... technical support Normal operating mode AP is waiting for the Spanning Tree No action is required or Spanning Tree detected a bridge loop and disconnected the port Remove the loop AP is occasionally saturated No action is required Cannot communicate with the wireless network Verify that the PC Card is properly inserted Cannot communicate with the wired network Verify that the Ethernet cable is pr...

Page 153: ...her TFTP error LEDs blink 10 times Upgrading Flash LEDs blink then turn on one at a time starting with Wireless LAN All LEDs except Wired LAN are on when the Flash upgrade is successful Invalid load image Wrong image image too large or CRC check error LEDs blink 10 times Unsuccessful Flash upgrade LEDs blink 10 times Firmware error or number of retries exceeded LEDs blink 10 times On Off Constant ...

Page 154: ...e LED is flashing together with the Bridge State LED the Ethernet port has a fault that prevents the AP from establishing a connection to the network Bridge State Lights green when the AP is forwarding packets AP Saturated Lights yellow when the AP is saturated Saturation occurs when the AP cannot forward packets from the Ethernet to the wireless side due to the lower throughput of the wireless ne...

Page 155: ...lure while initializing testing the memory Normal operating mode Waiting for the Spanning Tree No action is required AP is occasionally saturated due to excessive traffic No action is required PC Card is defective Ethernet problem after power up Cannot communicate with the wireless network Check the wireless parameters and PC Card Cannot communicate with the wired network ChecktheEthernet cable On...

Page 156: ... Downline loading image from load host Firmwareerrordetected while downline loading image from load host TFTP file not found Waiting for retry of TFTP load Upgrading Flash Flash upgrade successful Invalid wrong load image Unsuccessful Flash upgrade Invalid load image corrupted image Invalid load image image too large TFTP error Firmware error or number of retries exceeded Hardware error On Off Con...

Page 157: ...1 Choose Module Specific Options from the RoamAbout AP Installation Menu 2 Choose Show Counters The first screen displays counters with information specific to the Ethernet interface The second screen displays the same counters with information specific to the wireless interface The subsequent screens display a subset of the counters with information specific to wireless ports 1 through 6 The coun...

Page 158: ...ticast messages are regularly sent Typically this counter shows a lower value than the Individually Addressed Frames Sent counter Individuallyaddressed frames received Number of messages sent by other devices to this interface In most LAN applications it is normal behavior for this counter to have a high value and continuously increase you can see it run For example this counter should increase ra...

Page 159: ...The count does not include frames involved in collisions Block check error Number of frames received on the selected interface that are not an integral number of octets in length and do not pass the FCS check The count is incremented when the alignmentError status is returned by the MAC service to the LLC or other MAC user Frame error Number of times messages were received while a transmission els...

Page 160: ...messages This value is expected to be a large number Deferred Transmissions TxDeferredTransmissions Number of times the PC Card deferred a transmission to avoid collisions with messages transmitted by other devices Deferral is normal behavior for 802 11 devices A relatively high value for this counter identifies a wireless network with lots of activity Single retry frames sent TxSingleRetryFrames ...

Page 161: ...continuously increasing Typically this counter should display a value that is less than the RxUnicastFrames counter Fragments received RxFragments Total number of messages or message fragments received by the PC Card The running rate of this counter is a general indication of the amount of activity at the PC Card This counter should be greater than the sum of RxUnicastFrames plus RxMulticastFrames...

Page 162: ...ure of the amount of overlapped communication in your system Zero values indicate low to moderate load of your network Non zero values identify a wireless medium that is being used simultaneously by multiple users Receive message in bad msg fragments RxMessage InBadMsgFragments Number of times messages were received while a transmission elsewhere in the wireless network was in progress This counte...

Page 163: ...d that were less than 64 octets long excluding framing bits but including FCS octets and were otherwise well formed Oversize Pkts Total number of packets received that were longer than 1518 octets excluding framing bits but including FCS octets and were otherwise well formed Fragments Total number of packets received that were less than 64 octets in length excluding framing bits but including FCS ...

Page 164: ...additional error information by choosing Module Specific Options from the RoamAbout AP Installation Menu then selecting Dump Error Log Pkts 128 to 255 Octets Total number of packets including bad packets received that were between 128 and 255 octets in length inclusive excluding framing bits but including FCS octets Pkts 256 to 511 Octets Total number of packets including bad packets received that...

Page 165: ...ct of the RoamAbout Driver A problem or conflict with the PC Card slot or ISA Adapter Card that prevents the PC Card from powering on A conflict of the RoamAbout hardware with another device If you have a problem you should first look at the PC Card LEDs Figure 7 2 Table 7 12 describes the various modes of operation and associated LED activity The table also includes a number of troubleshooting hi...

Page 166: ...act the LAN administrator to verify the wireless network name assigned to the wireless infrastructure network Be aware that the wireless network name is case sensitive If using ANY as the wireless network name verify that the RoamAbout AP does not have Secure Access enabled The client may not be within range of an AP or ad hoc network Off Off Card is not powered on The cause may be No driver loade...

Page 167: ...ss network is using MAC Address authentication the client s MAC address must be configured on the RADIUS server If the wireless network is using 802 1X Rapid Rekeying the client must also be configured for Rapid Rekeying The procedure to configure a Windows XP client for Rapid Rekeying is in Set Up Rapid Rekeying on the Clients on page 5 38 If the wireless network is using encryption make sure tha...

Page 168: ...t you do not see the required protocols click Add then follow the on line instructions If this is the first time that networking support is installed on your computer Windows prompts you to enter the computer and workgroup names These names are used to identify your computer on the Microsoft Network Neighborhood To enter the computer and workgroup names 1 If the Network window is not opened click ...

Page 169: ...I O port and IRQ values perform the following 1 From the Taskbar click Start Select Programs Administrative Tools Windows NT Diagnostics 2 Click the Resources tab 3 Click the IRQ button to display the Interrupt Request IRQ vectors currently in use by other devices in your computer If IRQ value 10 default value for the PC Card is not used write down IRQ 10 If 10 is used select a value not listed in...

Page 170: ...d of changing the RoamAbout PC Card or ISA card Depending on the computer you might need to verify the settings of the BIOS which is loaded when you start your computer If the computer previously had a network card installed and the network card was running in 32 bit operation you may need to set the BIOS to PCIC 16 bit You may also need to disable the network card in the Control Panel Devices Win...

Page 171: ...e jumper setting on the ISA card Figure 7 3 The ISA card supports two I O addresses 3E0 3E1 factory set default 3E2 3E3 To change the jumper setting open your computer according to the documentation that was shipped with your computer and follow the safety precautions described in the RoamAbout installation documentation that came with the ISA adapter Figure 7 3 ISA Card I O Address Strapping ...

Page 172: ...to communicate with the AP using an incorrect SNMP community string authentication trap To enter an SNMP trap address using the console port 1 Choose Add SNMP Trap Addresses from the RoamAbout AP Installation Menu 2 Enter the IP address of the system that you want to receive the SNMP traps If you do not want to change the existing value press Enter to go back to the previous menu To delete an exis...

Page 173: ...pecific Options in the console port RoamAbout AP Installation Menu When enabled you can select one of the following Use the BootP Server to discover the IP address of the destination TFTP server and the destination directory on that server Upload the image to the specified TFTP server IP address and a destination directory NOTE This feature is not available on the RoamAbout R2 NOTE You must use th...

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Page 175: ...e is divided by shoulder height hollow wall elements antennas are at desktop level R F frequency band 2 4 GHz 2400 2483 5 MHz Number of selectable sub channels North America FCC 11 Europe ETSI 13 France FR 4 Japan JP 13 low power cards 14 high power cards Other countries that adhere to FCC ETSI 11 13 Modulation technique Direct sequence spread spectrum DQPSK CCK DBPSK Spreading 11 chip barker sequ...

Page 176: ...of the RoamAbout PC Card is not available in FCC regulated countries This PC Card is used when connecting to an outdoor 14 dBi directional antenna in countries that adhere to radio regulations as defined by the ETSI 13 Modulation technique Direct sequence spread spectrum DQPSK CCK DBPSK Spreading 11 chip barker sequence Bit error rate Better than 10 5 Nominal Output Power 8 dBm Range Consult the R...

Page 177: ...ontrolled by the LAN administrator who sets the RoamAbout AP configuration Table A 3 shows the factory set default values which are printed in bold Table A 3 IEEE 802 11 RoamAbout Channel Sets Frequency range 2400 2500 MHz Channel ID FCC ETSI France Japan 1 2412 2412 2412 2 2417 2417 2417 3 1 2422 1 The Access Point 2000 uses this channel as the default 12422 2422 4 2427 2427 2427 5 2432 2432 2432...

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Page 179: ...onsole port Signals from the console port conform to the EIA 232D signaling standard at 9600 baud only The port appears as a data terminal equipment DTE device To connect a device to the AP console port do the following 1 Choose a device terminal or personal computer to connect to the AP 2 Connect a null modem cable or equivalent to the device and the AP using the following pin assignment For the ...

Page 180: ... Choose a name that identifies the connection type such as AP Console Port c Ignore or cancel any prompts for modem or phone information d In a Connect Using or similar field select the port that is connected to the AP such as COM1 e In the Port Settings window enter Bits per second 9600 Data bits 8 Parity None Stop Bits 1 Flow Control Hardware for the Access Point 2000 None for the RoamAbout R2 T...

Page 181: ...Press your Enter or Return key to activate a data entry field Press the space bar to toggle a multiple choice field Select Apply if you want to check your configuration changes before saving them Select Save before you Reset Reload or Exit out of the console to save your configuration changes in each screen If you do not want to change the existing value press Enter to go back to the previous menu...

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Page 183: ...is Appendix provides the ASCII to HEX conversion for use with third party products that do not allow ASCII entry of encryption keys ASCII Value HEX Value 0 30 1 31 2 32 3 33 4 34 5 35 6 36 7 37 8 38 9 39 A 41 a 61 B 42 b 62 C 43 c 63 D 44 d 64 ...

Page 184: ...C 2 E 45 e 65 F 46 f 66 G 47 g 67 H 48 h 68 I 49 i 69 J 4A j 6A K 4B k 6B L 4C l 6C M 4D m 6D N 4E n 6E O 4F o 6F P 50 p 70 ASCII Value HEX Value ...

Page 185: ...C 3 Q 51 q 71 R 52 r 72 S 53 s 73 T 54 t 74 U 55 u 75 V 56 v 76 W 57 w 77 X 58 x 78 Y 59 y 79 Z 5A z 7A ASCII Value HEX Value ...

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Page 187: ...eferred to as peer to peer networks AP A generic term that refers to the RoamAbout Access Point RoamAbout Access Point 2000 or the RoamAbout R2 Wireless Access Platform Beacon A message that is transmitted at regular intervals by the RoamAbout AP to all wireless clients in the wireless network Beacons are used to maintain and optimize communications by helping mobile clients to automatically conne...

Page 188: ...na A 14 dBi Yagi directional antenna is available as an option for the RoamAbout AP Endpoint Bridge Mode An AP mode that allows two APs to communicate effectively connecting two wired LANs through a wireless link Ethernet Adapter The Ethernet Adapter is used on wired devices for example desktop computers and printers to make them wireless devices ETSI European Telecommunications Standards Institut...

Page 189: ...reless link Omni Directional Antenna An antenna that radiates RF signals in all directions An omni directional antenna typically has a lower gain and covers less distance than a directional antenna A 7 dBi omni directional antenna is available as an option for the RoamAbout AP PC Card A network card that installs in an AP or wireless client to provide wireless connectivity in a LAN environment PCI...

Page 190: ...tion As the client moves between different wireless cells the RoamAbout PC Card keeps track of the quality of the radio connection with the APs As the client moves away from its AP and the signal level decreases the RoamAbout PC Card automatically connects to another AP in the same network that has a stronger signal level SNR The Signal to Noise Ratio SNR is a dynamic indicator that indicates the ...

Page 191: ...network that consists of wireless clients connected by one or more APs to a wired Ethernet LAN wireless network A collection of end user systems connected together using a medium such as radio frequency or infrared technology The RoamAbout products use radio frequencies wireless relay Access Point 2000 only When enabled the multipoint AP relays messages from one AP to another When disabled each of...

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Page 193: ...finition 1 2 factory defaults 5 48 firmware version 6 13 image file 6 14 LEDs 7 2 optimal placement procedure 6 5 reload 6 14 replacing PC Card 6 16 security cover 3 2 selecting location multiple APs 3 5 selecting location single AP 3 4 types 7 2 upgrading 6 14 AP 2000 connector pinout B 1 definition 1 2 LED descriptions 7 5 LED patterns 7 6 network loading LEDs 7 7 AP Classic introduction 1 2 LED...

Page 194: ...sent LED 7 8 CDP infrastructure 5 6 overview 5 21 point to multipoint 5 16 point to point 5 11 Cell 1 6 Central AP choosing bridge mode 5 14 configuring AP Manager 5 15 console port 5 17 console port R2 5 16 description 1 10 Channel description 2 4 infrastructure network 5 3 list of A 3 point to multipoint network 5 14 point to point network 5 9 R2 restrictions 2 4 3 6 setting using web management...

Page 195: ...n 1 6 determining 3 2 overlap 3 5 size by transmit speed 3 3 3 7 3 8 using Site Monitor 6 5 CSMA CA protocol 2 9 D data corruption 6 15 Data Link layer 1 2 Data throughput efficiency description 2 8 DECnet End Node Hello filter 5 45 DECnet filter 5 45 Delivery Traffic Indication Message See DTIM Deny Non Encrypted Data 5 25 7 16 DHCP description 5 19 modifying with console port 5 21 modifying with...

Page 196: ...ication B 2 I I O Base address 7 23 7 24 IGMP 5 4 Image file 6 14 Infrastructure network required information 5 3 wireless parameters 5 3 5 4 Ingress Filtering 2 25 Integrity tests 5 47 IntraBSS infrastructure network 5 4 modifying 5 23 IP address AP 4 5 methods to configure 5 19 IP Address Initialization 5 19 IP Address Mode 5 6 5 11 5 16 5 20 IP V4 filter 5 44 IP V6 filter 5 45 IPX 80 2 2 filter...

Page 197: ...D5 2 15 Mezzanine option 1 6 1 10 3 6 Mezzanine Wireless Forwarding Slot 2 LED 7 3 MIB objects AP 2000 2 26 RoamAbout R2 2 27 Microcell AP density setting 2 8 Microsoft Client for Microsoft Networks 2 20 Microsoft Internet Explorer versions 4 6 Minicell AP density setting 2 8 Module OK LED 7 8 Multicast message 2 13 2 21 multicast traffic limiting 2 21 Multicast Transmit Rate infrastructure networ...

Page 198: ...less parameters 5 9 ports used for VLANs 5 41 Power LED 7 3 Power management description 2 11 Power OK LED 7 8 Power System OK LED 7 5 Protocol Filter overview 2 21 R R BIN file 6 14 R2 See RoamAbout R2 radio characteristics with outdoor antenna A 2 without antenna A 1 RADIUS Authentication See authentication RADIUS client configuring AP Manager 5 33 console port 5 35 console port R2 5 34 monitori...

Page 199: ...ors 7 15 RxFragments 7 15 RxMessageInBadMsgFragments 7 16 RxMessageInMsgFragments 7 16 RxMulticastFrames 7 15 RxUnicastFrames 7 15 S Secure Access configuring 5 24 description 2 12 infrastructure network 5 4 integrity test 5 47 modifying 5 22 Security configuring 5 24 description 2 12 for Access Point console port 2 19 for RoamAbout R2 console port 2 19 Set Exclude SNMP 5 27 5 28 Set Exclude Unenc...

Page 200: ...access 4 6 used with VLAN 5 42 TFTP loader 6 14 use in upgrade 6 14 6 15 with AP Manager 4 2 with Reset button 5 48 Tools 4 1 transaction processing application with power management 2 11 Transmit rate auto rate 2 6 description 2 5 fixed rate 2 6 2 20 2 21 integrity test 5 47 modifying 5 22 Transport Layer Security TLS 2 15 TxDeferredTransmissions 7 14 TxDiscards 7 15 TxDiscardsWrongSA 7 16 TxFrag...

Page 201: ...ess Forwarding Slot 1 LED 7 3 Wireless infrastructure network definition 1 1 description 1 6 hardware installation 3 9 multiple 3 6 requirements 3 2 3 6 Wireless LAN Activity LED 7 3 7 5 7 8 Wireless MAC address 5 8 5 13 Wireless network configurations 1 1 Wireless network name description 2 2 incorrect 7 21 infrastructure network 5 3 integrity test 5 47 Wireless parameters current settings 5 18 W...

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