Avaya Troubleshooting Routers Guía para resolver problemas descargar pdf (Pagina 105)

Troubleshooting a Data Link Layer Problem

308656-14.00 Rev 00

5-27

If the local loopback test did not cause any error count to be incremented, but the

remote loopback test did, request that the carrier test the line and remote CSU/

DSU.

If the local loopback test causes the error counts to continue to increment,

complete one of the following procedures to isolate the problem:

• Disconnect the cable from the port of the router reporting the errors and plug

it into another port on the router you know works correctly.

If the synchronous errors persist, verify that you properly configured the

newly tested port, test the cable, and test the local CSU/DSU.

If the errors stop, compare the newly tested port’s configuration with that of

the original port. If the port configurations are the same, try swapping the link

module with a new link module.

• Connect the port of the router reporting the errors to another CSU/DSU and

monitor the line statistics.

If the errors persist, try another cable or try swapping the link module with a

new link module.

Troubleshooting the Internal Clock Settings (Lab Environments Only)

If you are using crossover cables to connect to two back-to-back routers in a lab

environment, make sure all interfaces on a given slot have consistent clock source

and speed settings. A message such as the following appears if two interfaces on a

slot have inconsistent clock settings:

Warning Sync Code: 40 “Connector COM2: clock speed does not match

other ports.”

Check the clock source and speed settings as follows:

Enter the following command to display the clock source setting for each

slot and connector in the router:

get wfSyncEntry.13.*

Note:

All internally clocked ports on a slot change to the last configured

internal clock speed when you boot, save a dynamic configuration change, or

enter the

config

command.

1 2 ... 100 101 102 103 104 105 106 107 108 109 110 ... 267 268

Sin comentarios

Avaya Troubleshooting Routers Guía para resolver problemas Pagina 105