Cabletron Systems SmartSTACK STS16-20RM Installation And User Manual page 229

Procedure B
Use this procedure if the ERR LED is on:
1. Verify that the boot code is at least release 2.3. If not, download the boot code
using either TFTP or serial download as described in Chapter 6, "Switch
Configuration".
2. Reset the switch by disconnecting the power cord, waiting 10 seconds, and then
reconnecting it to the electrical outlet. If the problem goes away, resume using
the switch.
3. If you have just downloaded new microcode, clear NVRAM and reset the
switch using the instructions in "Reset Screen" on page 151.
Note: Clearing NVRAM returns all configuration parameters to their default
values.
If the problem is corrected, resume using the switch.
4. One or more bad ports can cause this symptom, and the remaining ports might
continue to operate.
— Reset the switch and monitor the diagnostic messages that appear for port
failures. The section "Diagnostic Screen" on page 69 includes a sample
diagnostic screen. Try to correct any individual port problems that are
detected.
— If the failing ports are expansion module ports, use the expansion module
documentation to try to correct the problem.
— If the problem is corrected, resume using the switch.
5. If the problem does not go away, the problem is in the switch.
Procedure C
Use this procedure if all devices connected to the switch are having communication
problems, the ERR LED is off, and the PWR LED is on:
1. Reset the switch by disconnecting power cord for 10 seconds.
— If the problem goes away, resume using the switch.
— If the status LEDs indicate a failure, go to "Procedure B".
— If the problem persists, check all the configuration parameters.
— If the problem has still not been resolved, go to "Procedure D" and try to
get individual ports working.
Troubleshooting SmartStack STS16-20RM/STS16-20FRM Token Ring Switches, P/N: 9032957-01
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