Usage Notes - Cisco MWR 1941-DC User Manual

Cisco MWR 1941-DC Router with the Cisco IOS IP-RAN Feature Set
The LNM provides the following types of noise monitors:
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Usage Notes

When configuring the LNM, please note the following:
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Link Warning—Issues a warning when the noise level of a link exceeds a user-defined threshold and
notifies the operator when the noise level improves to the point that it drops below a second
user-defined threshold.
Link Removal—Issues an error and removes a link from service when the noise level of the link
exceeds a user-defined threshold and restores the link and provides notification when the noise level
improves to the point that it drops below a second user-defined threshold.
If the noise level on the last active link in a multilink bundle exceeds the Link Removal
Note
threshold, an alert is issued but the link will not be removed from service. If this situation
occurs, the standard T1 error rate is used to determine if the last active link must be removed
from service.
If the warn and remove keywords are specified without any other options, the LCV and PCV
thresholds and duration defaults will be use to determine (set) and clear (clear) the condition.
If the span command is issued with the set keyword specified (defining the LNM type and
parameters to use to determine a condition exists) and the command is not issued again with the
clear keyword specified (defining the parameters used to clear a condition), or vice versa, the values
configured for the threshold and duration will be used for both.
If the span command is issued without either the set or clear keywords specified, set is the default.
The set and clear keywords can only be specified if the threshold or duration has been specified.
If the PCV threshold is not configured (using the pcv keyword and value), the threshold is calculated
using Gaussian probability distribution that is representative of most noise environments.
The following SYSLOG messages have been added for fault notification:
- %LNM-4- WARNEXCEED:Controller <Controller IF>, exceeded noise warning threshold
<int>, duration <int>
- %LNM-4- WARNIMPROVE:Controller <Controller IF>, noise improved below threshold
<int>, duration <int>
- %LNM-2-REMOVE:Interface <Serial IF> removed, noise exceeded threshold <int>,
duration <int>
- %LNM-2- RESTORE:Interface <Serial IF> restored, noise improved below threshold
<int>, duration <int>
- %LNM-2- REMEXCEED:Interface <Serial IF>, noise exceeded threshold <int>,
duration <int>
- %LNM-2- REMIMPROVE:Interface <Serial IF>, noise improved below threshold <int>,
duration <int>
Configuring Tasks
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