125
Troubleshooting
This section is intended to help solve the most common problems on the PoE Managed
Switch.
Incorrect connections
The switch port can automatically detect straight or crossover cable when you link switch
with other Ethernet device. For the RJ-45 connector should use correct UTP or STP
cable, 10/100Mbps port use 2-pairs twisted cable and Gigabit 1000T port use 4 pairs
twisted cable. If the RJ-45 connector is not correctly pinned on right position then the link
will fail. For fiber connection, please notice that fiber cable mode and fiber module should
be match.
Faulty or loose cables
Look for loose or obviously faulty connections. If they appear to be OK, make sure the
connections are snug. IF that does not correct the problem, try a different cable.
Non-standard cables
Non-standard and miss-wired cables may cause numerous network collisions and other
network problem, and can seriously impair network performance. A category 5e/6-cable
tester is a recommended tool for network installation.
RJ-45 ports:
Use unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for
RJ-45 connections. Also be sure that the length of any twisted-pair connection does not
exceed 100 meters (328 feet). Gigabit port should use Cat-5e or cat-6 cable for
1000Mbps connections. The length does not exceed 100 meters.
Improper Network Topologies
It is important to make sure that you have a valid network topology. Common topology
Summary of Contents for LPES-2208CA
Page 2: ...Revision History Document Release Date Revision Initials 1 00 Aug 28 2009 New Edit Vincent ...
Page 57: ...50 IP Configuration interface ...
Page 66: ...59 Syslog Configuration interface ...
Page 68: ...61 SMTP Configuration interface ...
Page 70: ...63 Event Configuration interface ...
Page 74: ...67 Click Apply to have the configuration take effect SNTP Configuration interface ...
Page 76: ...69 IP Security interface ...
Page 79: ...72 Port Statistics interface ...
Page 81: ...74 Port Control interface ...
Page 91: ...84 State Activity of Switch 2 ...
Page 105: ...98 RSTP System Configuration interface ...
Page 107: ...100 RSTP Port Configuration interface ...
Page 109: ...102 SNMP System Configuration interface ...
Page 112: ...105 SNMP v3 configuration interface ...
Page 115: ...108 QoS Configuration interface Port Based Priority Configure per port priority level ...
Page 118: ...111 IGMP Configuration interface ...