OLT-1308 Series User’s Guide
229
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H A P T E R
35
ARP Table
This chapter introduces ARP Table.
35.1 Introduction to ARP Table
Address Resolution Protocol (ARP) is a protocol for mapping an Internet Protocol address (IP
address) to a physical machine address, also known as a Media Access Control or MAC
address, on the local area network.
An IP (version 4) address is 32 bits long. In an Ethernet LAN, MAC addresses are 48 bits
long. The ARP Table maintains an association between each MAC address and its
corresponding IP address.
35.1.1 How ARP Works
When an incoming packet destined for a host device on a local area network arrives at the
switch, the switch's ARP program looks in the ARP Table and, if it finds the address, sends it
to the device.
If no entry is found for the IP address, ARP broadcasts the request to all the devices on the
LAN. The switch fills in its own MAC and IP address in the sender address fields, and puts the
known IP address of the target in the target IP address field. In addition, the switch puts all
ones in the target MAC field (FF.FF.FF.FF.FF.FF is the Ethernet broadcast address). The
replying device (which is either the IP address of the device being sought or the router that
knows the way) replaces the broadcast address with the target's MAC address, swaps the
sender and target pairs, and unicasts the answer directly back to the requesting machine. ARP
updates the ARP Table for future reference and then sends the packet to the MAC address that
replied.
35.2 Viewing ARP Table
Click
Management
in the navigation panel and then
ARP Table
to open the following screen.
The ARP table can hold up to 500 entries.
Summary of Contents for OLT-1308
Page 2: ......
Page 7: ...Safety Warnings OLT 1308 Series User s Guide 7 ...
Page 8: ...Safety Warnings OLT 1308 Series User s Guide 8 ...
Page 28: ...List of Tables OLT 1308 Series User s Guide 28 ...
Page 30: ...30 ...
Page 34: ...Chapter 1 Introducing the OLT OLT 1308 Series User s Guide 34 ...
Page 38: ...Chapter 2 Hardware Installation and Connection OLT 1308 Series User s Guide 38 ...
Page 44: ...44 ...
Page 58: ...Chapter 5 Initial Setup Example OLT 1308 Series User s Guide 58 ...
Page 72: ...Chapter 6 System Status and Port Statistics OLT 1308 Series User s Guide 72 ...
Page 94: ...Chapter 7 Basic Setting OLT 1308 Series User s Guide 94 ...
Page 96: ...96 ...
Page 106: ...Chapter 8 VLAN OLT 1308 Series User s Guide 106 ...
Page 116: ...Chapter 11 Spanning Tree Protocol OLT 1308 Series User s Guide 116 ...
Page 126: ...Chapter 15 Link Aggregation OLT 1308 Series User s Guide 126 ...
Page 132: ...Chapter 17 Queuing Method OLT 1308 Series User s Guide 132 ...
Page 138: ...Chapter 18 Classifier OLT 1308 Series User s Guide 138 ...
Page 143: ...Chapter 19 Policy OLT 1308 Series User s Guide 143 Figure 53 Policy Example ...
Page 144: ...Chapter 19 Policy OLT 1308 Series User s Guide 144 ...
Page 158: ...158 ...
Page 162: ...Chapter 22 Classification Filter Profile OLT 1308 Series User s Guide 162 ...
Page 172: ...Chapter 23 VLAN Profile OLT 1308 Series User s Guide 172 ...
Page 184: ...Chapter 26 Destination Filter OLT 1308 Series User s Guide 184 ...
Page 188: ...Chapter 27 Port Authentication OLT 1308 Series User s Guide 188 ...
Page 190: ...190 ...
Page 200: ...Chapter 29 Maintenance OLT 1308 Series User s Guide 200 ...
Page 212: ...Chapter 30 Access Control OLT 1308 Series User s Guide 212 ...
Page 218: ...Chapter 32 Syslog OLT 1308 Series User s Guide 218 ...
Page 224: ...Chapter 33 Cluster Management OLT 1308 Series User s Guide 224 ...
Page 228: ...Chapter 34 MAC Table OLT 1308 Series User s Guide 228 ...
Page 232: ...Chapter 36 IGMP Table OLT 1308 Series User s Guide 232 ...
Page 234: ...234 ...
Page 285: ...Chapter 38 Command Examples OLT 1308 Series User s Guide 285 ...
Page 286: ...Chapter 38 Command Examples OLT 1308 Series User s Guide 286 ...
Page 294: ...Chapter 39 Troubleshooting OLT 1308 Series User s Guide 294 ...
Page 296: ...296 ...
Page 302: ...Appendix B Legal Information OLT 1308 Series User s Guide 302 ...