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Chapter 19
Configuring Link Noise Monitoring
Command
Step 1
t1 t1-number channel-group
channel-group-number timeslots
list-of-timeslots
Example:
Router(config-controller)# t1 1
channel-group 0 timeslots 1-24
Step 2
t1 t1-number span {minor-warn | {remove |
major-warn}} [{[lcv value [pcv value]]
[duration seconds]} set | clear]
Example:
Router(config-controller)# t1 1 span
minor-warn lcv 20 pcv 10 duration 10 set
Enabling Syslog Messages
To enable the generation of syslog messages on a particular T1/TE1 link use the following command
syntax. Use the no form of the command to disable generation of syslog messages.
OL-2226-23
Description
Specifies the channel group and timeslots on a T1 interface.
•
t1-number—The T1 interface number from 1 to 28.
Channel-group channel-group-number—Identifies the
•
channel group with any number from 0 to 23
•
Timeslots list-of-timeslots—T1 is divided into 24 timeslots
(or DS0s).
Generates a minor-warn, a major-warn or a remove event based
on the defined thresholds, for the T1 interface.
•
t1-number—The T1 interface number from 1 to 28.
minor-warn—Enables link warning (minor) monitoring
•
on the link.
•
major-warn—Enables link warning (major) monitoring on
the link.
remove—Enables Link Removal monitoring on the link.
•
•
lcv value—The Line Code Violation (LCV) threshold value
in bit error per second. The valid range on a T1 link is 5 to
1544 seconds. The valid range on an E1 link is 7 to 2048
seconds.
The default LCV value for minor-warn on a T1 link is
–
154 seconds and an E1 link is 205 seconds.
The default LCV value for major-warn or removal on a
–
TI link is 1544 seconds and an E1 link is 2048 seconds.
pcv value—Number of time slots in error per second. If not
•
specified, this value is calculated from the LCV threshold
based on a Gaussian distribution.
The default PCV value for minor-warn on a T1 link is
–
145 seconds and an E1 link is 205 seconds.
–
The default PCV value for major-warn or removal on a
TI link is 320 seconds and an E1 link is 832 seconds.
•
duration seconds—The number of consecutive seconds
that a threshold is exceeded or improved for a condition to
occur. The valid range on a T1/E1 link is 4 to 600 seconds.
The default value for T1 and E1 links is 10 seconds.
set—Specifies the set condition. Set is the default when no
•
conditions are specified.
clear— Specifies the clear condition.
•
Cisco 10000 Series Router Software Configuration Guide
About Link Noise Monitoring
19-3
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Troubleshooting
