Lantronix S8TB S8TB User Guide Rev D - Page 7

Lantronix S8TB User Guide 3 Troubleshooting This section is intended to help you solve the most common problems on the S8TB switch. Incorrect Connections 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 mis-wired cables may cause numerous network collisions and other network problems and can seriously impair network performance. A category 5-cable tester is a recommended tool for every 100Base-TX network installation. RJ-45 ports: Use unshielded twisted-pair (UTP) or shield twisted-pair (STP) cable for RJ-45 connections: 100Ω Category 3, 4 or 5 cable for 10Mbps connections or 100Ω Category 5 cable for 100Mbps connections. Also be sure that the length of any twisted-pair connection does not exceed 100 meters (328 feet). Improper Network Topologies It is important to make sure that you have a valid network topology. Common topology faults include excessive cable length and too many repeaters (hubs) between end nodes. In addition, you should make sure that your network topology contains no data path loops. Between any two end nodes, there should be only one active cabling path at any time. Data path loops will cause broadcast storms that will severely impact your network performance. Diagnosing LED Indicators The switch can be easily monitored via panel LEDs, which describe common problems you may encounter, and to assist in identifying problems and find possible solutions. See "LED Indicators" on page 6. Labeling After performing the troubleshooting steps above, and before contacting Tech Support, check the product and packaging labels for information to provide Tech Support. Product Label Box Label 33672 Rev. D https://www.lantronix.com/ Page 7 of 11