Channelized T3 Line Card Alarms And Error Messages; Channelized T3 Line Card Alarms - Cisco 10000 Series Troubleshooting Manual

Channelized T3 Line Card Alarms and Error Messages

Channelized T3 Line Card Alarms and Error Messages
This section describes alarm and error messages that can be generated by the channelized T3 line card.
Where possible, the source of the error message is explained and a corrective action is suggested below.

Channelized T3 Line Card Alarms

Table 5-5
Table 5-5
Alarm Type
AIS
Receive Alarm
Indication Signal
Major
LOF
Loss of Frame
Major
RAI
Receive Remote
Alarm Indication
Major
Cisco 10000 Series Router Troubleshooting Guide
5-6
describes the standard T1 alarms that can be raised on the channelized T3 line card.
CT3 Line Card Alarms: T1 Alarms
Cause of Alarm
A received alarm indication signal
(AIS) indicates an alarm raised on
a line upstream from the
Cisco 10000 series router.
A loss of frame (LOF) condition
typically happens in one of two
situations:
The configuration settings on
1.
the port are not correct for the
line.
2. The port configuration is
correct but the line is
experiencing other errors that
result in an LOF alarm.
RAI indicates a problem between
the C10000 T3 transmitter and the
far end T3 receiver, but it may not
be in the segment between the
C10000 and the adjacent node.
Chapter 5 Cisco 10000 Series Router Alarms and Error Messages
Corrective Action
Check the status of the adjacent
1.
network element to determine if the
problem is there. If the problem is not
in the adjacent network element, go to
Step 2.
Ask your T1 service provider to trace
2.
the source of the AIS signal.
Contact the Cisco TAC.
3.
Check to see if the framing format
1.
configured on the port matches the
framing format on the line.
Try the other framing format and see
2.
if the alarm clears.
Configure a remote loopback on the
3.
affected interface, then run an
unframed T1 BERT. This will help
determine if there are problems on the
line.
If you find evidence of a bad line, you
can isolate the problem using
loopbacks. (Refer to the
Loopback Tests" section on
page 6-6.)
Connect an external loopback cable to
1.
the port. If there are no alarms, the
problem is not with the
Cisco 10000 series router. (Refer to
the "Using Loopback Tests" section
on page 6-6)
Examine adjacent network elements
2.
and check for LOS or LOF alarms.
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