Avaya Troubleshooting Routers Instrukcja Naprawy Pobierz pdf (Strona 85)

Troubleshooting a Data Link Layer Problem

308656-14.00 Rev 00

5-7

PVC Problems

For PVC problems, do the following:

If the connecting switch does not support signaling, verify that signaling

is disabled.

Check the log for

failed to register

messages.

This message usually indicates an oversubscribed interface. Add the peak cell

rate (PCR) and sustainable cell rate (SCR) values of each PVC to verify that

the combined value does not exceed the cell rates you have configured on the

interface.

If the PVC terminates at a non-Nortel Networks IP device, define an

adjacent host entry using the outgoing VPI/VCI number of the device as

the MAC address.

Using the VCL MIB objects, verify the configured cell and frame

statistics for each VC.

If the interface is running LLC/SNAP encapsulation, check the

wfAtmMpeEntry MIB object for PID errors.

Verify that the PVC is not a termination point for a C100 connection

(such as C100 Turbo or Circuit Saver).

Troubleshooting ATM LANE

This section assumes that you have isolated a problem to the ATM LAN emulation

(LANE) protocol. Troubleshoot ATM LANE problems as follows:

Use the Events Manager or the Technician Interface to enable extended

debugging in the wfAtmLec MIB objects.

The Technician Interface command is as follows:

g wfAtmLecConfigEntry.29.3

Filter the log to display messages of all severity levels for the slots

experiencing the problem.

Enter the following Technician Interface command:

log -fftwid -eATM -eATM_SIG -eATM_LE -s

<slot_no.>

1 2 ... 80 81 82 83 84 85 86 87 88 89 90 ... 267 268

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Avaya Troubleshooting Routers Instrukcja Naprawy Strona 85