Troubleshooting; Related Manuals - Transition Networks SM24DPB Install Manuals

Transition Networks
Troubleshooting
Most problems are caused by the following situations. Check for these items first when starting your
troubleshooting:
1. Connecting to devices that have a fixed full‐ duplex configuration. Make sure all devices connected to the
SM16TAT2DPA Switch devices are configured to auto negotiate, or are configured to connect at half duplex.
2. 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.
3. Non‐standard cables. Non‐standard and miswired cables may cause network collisions and other network
problems, and can seriously impair network performance. Use a new correctly‐wired cable. A Category 5
cable tester is a recommended tool for every 100Base‐TX and 1000Base‐T network installation.
4. Improper Network Topologies. It is important to make sure you have a valid network topology. If you no
longer experience the problems, the new topology is probably at fault. In addition, you should make sure
that your network topology contains no data path loops.
5. Check the port configuration. A port on your Switch may not be operating as you expect because it has been
put into a "blocking" state by Spanning Tree, GVRP (automatic VLANs), or LACP (automatic trunking). (Note
that the normal operation of the Spanning Tree, GVRP, and LACP features may put the port in a blocking
state.) Or, the port just may have been configured as disabled through software.
6. SYS LED is Off. Check connections between the switch, the power cord and the wall outlet. Contact Tech
Support for assistance. See Contact Us below.
7. Link LED is Off. Verify that the switch and attached device are powered on. Be sure the cable is plugged into
the switch and corresponding device. If the switch is installed in a rack, check the connections to the punch‐
down block and patch panel. Verify that the proper cable type is used and its length does not exceed
specified limits. Check the adapter on the attached device and cable connections for possible defects.
Replace the defective adapter or cable if necessary.
8. Contact Transition Networks Tech Support for assistance. See Contact Us below.
Related Manuals
The following manuals detail related switch aspects:
•
SM24DPB Quick Start Guide, 33680
•
SM24DPB Web User Guide, 33682
•
SM24DPB CLI Reference, 33683
•
SFP manuals (model specific)
•
Release Notes (version specific)
Also, as part of the switch software, there is an online web‐based help that describes the management related
features.
33681 Rev. B https://www.transition.com
SM24DPB Install Guide
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