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Troubleshooting a Data Link Connection Problem

5-19

Troubleshooting a Synchronous Connection

This section assumes that you have isolated a problem to a synchronous

connection. If not, refer to Chapter 2 to determine whether these instructions

apply to your problem.

Troubleshoot a synchronous connection as follows:

1. Filter the log to display only messages from the Sync entity running on

the slots experiencing the problem. The Technician Interface command is

log -fftwid -eSYNC -s

<slot_no.>

Example

If you are ﬁltering events from Slots 3 and 4, you enter

log -fftwid -eSYNC -s3 -s4

If you see a message like the following, refer to “Troubleshooting the Internal

Clock Settings (Lab Environments Only)” later in this chapter.

Warning Sync Code: 40 "Connector COM2: clock speed does not

match other ports."

2. Use the Technician Interface to look at the values of the following

attributes in the wfSyncEntry object. Display and record these statistics,

wait 1 minute, and repeat. Compare the statistics shown each time to

determine whether the media is currently experiencing problems. If the

error statistics change, check the reception and transmission statistics of

the other ports in the same slot.

The

get command is next to the attribute name. Or, use this Quick Get path to

access them: wfLine➔wfSyncTable.

• wfSyncRuntsRx (

get wfSyncEntry.51.*)

This shows the number of frames received that are smaller than minimum

length. Usually indicates a clocking problem on the line.

• wfSyncBadFramesRx (

get wfSyncEntry.49.*)

Frames received that were unrecognizable. May indicate underﬂow errors

or an out-of-phase clock on the remote side.

• wfSyncLackRescRx (

get wfSyncEntry.42.*) and wfSyncLackRescRx:

(

get wfSyncEntry.43.*)

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Avaya Troubleshooting Routers Guide de dépannage Page 97