10. Troubleshooting; Obtaining Service; Troubleshooting In A Network; Start Of Troubleshooting Process - Cabletron Systems SmartSTACK STS16-20RM Installation And User Manual

10. Troubleshooting

This chapter contains procedures that help you troubleshoot problems with an
STS16-20RM or a STS16-20FRM Token Ring Switch and its connections to other
devices.

Obtaining Service

There are no serviceable parts inside the switch. Do not remove the cover for any
reason. If you think your switch or its SSIMs requires service, please contact
Cabletron Technical Support. Please refer to Chapter 11, "Getting in Touch with
Technical Support" for instructions.

Troubleshooting in a Network

The switch console and SNMP management agent give you access to important
statistics and other information about the network, as seen by the switch. (See
Chapter 7, "Monitoring the Network from the Console Statistics Menu").
The section "Port Statistics Menu" on page 160 can be helpful in isolating network
level problems.
The Switched Port Analyzer feature allows a network analyzer to be attached to a
port on the switch to monitor, in real time, switch activity of another port. See
Chapter 9, "Monitoring Port Traffic" for information on configuring Switched Port
Analyzer.

Start of Troubleshooting Process

If one or more devices (such as PCs) connected to a switch are unable to
communicate with other devices in the network, use the following steps to start the
troubleshooting process:
1. Locate the switch to which the device is connected. Use the network sketch, the
label on the cable connected to the device, or other network records to help you
locate the switch.
2. If you have an SSIM and the problem is related to it, use its documentation to
assist in troubleshooting.
3. If you have set up a console session (see Chapter 5, "Accessing Switch
Management"), it can be used to determine whether diagnostics have been
completed correctly. A list of normal diagnostic messages is shown on page 69.
Troubleshooting SmartStack STS16-20RM/STS16-20FRM Token Ring Switches, P/N: 9032957-01
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