Cabletron Systems TRMM-4, Руководство пользователя

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MONITORING AND TROUBLESHOOTING
3-6
3.2.3 Failure To Manage Rings
If the TRMM-4 is not gathering statistical data on an interface, try the
following:
• Use each NSRT LED to verify the management interfaces are inserted
and participating in the ring.
• If the problem is with FNB Ring 1, verify that the LWRP LED is unlit
indicating the TRMM-4 is not isolated from FNB Ring 1.
Failure of a management interface to insert may indicate a beaconing
ring. The TRMM-4 will not insert into a beaconing ring. After
detecting a beaconing ring the TRMM-4 will continuously stop trying
to insert for 30 seconds and then re-attempt insertion. If you suspect a
beacon, remove MIMs from the hub one at a time (pausing long
enough for the TRMM-4 to try to re-insert) until the TRMM-4 inserts
into the ring. When you remove a MIM with a device that was causing
the beacon, the beacon should stop and the TRMM-4’s NSRT LED
(for that interface) will turn GREEN.
3.2.4 Checking The Hub
This section describes how to inspect the hub to verify proper operation or
isolate problems.
•
Check the status of the LEDs on all MIMs in the MMAC. See the
appropriate MIM User’s Guides for descriptions of its LEDs.
-
Ensure the ERR LED(s) on the MIMs are unlit. A lit ERR LED
may indicate a speed-fault condition, or a RO port that has no
connection. If neither of these conditions occurred, remove and
then reinsert MIMs to resolve the problem.
-
Use the LEDs to ensure that you configured the hub as intended.
Does the MGMT LED(s) show MIMs under TRMIM-4 control?
Does each 16 Mb LED indicate that each ring has been set to the
correct speed? Use the BYP and ACT LED(s) to verify which
rings are in bypass and/or active.
• Ensure MIMs are installed in the correct slots for your configuration.