LevelOne FSW-1671 Manual - Page 41
Troubleshooting
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Troubleshooting This section is intended to help the user solve the most common problems on the FSW-1671 Web Smart Switch. Incorrect connections The switch port can auto-detect straight or crossover cable when the user links switch with other Ethernet device. The RJ-45 connector should use correct UTP or STP cable. 10/100Mbps ports use 2 pairs twisted cable and Gigabit 1000T ports 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 should match the fiber module . 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 5-cable tester is a recommended tool for every 100Base-T network installation. Improper Network Topologies It is important to make sure that users have a valid network topology. Common topology faults include excessive cable length and too many repeaters (hubs) between end nodes. In addition, the user should make sure that the network topology contains no data path loops. Between any two ends nodes, there should be only one active cabling 37