Link Degrade Monitoring
Learn how to use Link degrade monitoring to track Ethernet link quality by monitoring bit error rates (BER) and trigger corrective actions when thresholds are exceeded. Configure this feature to prevent packet drops and ensure reliable connections.
Link degrade monitoring tracks physical link quality on Ethernet interfaces and triggers
corrective actions when link quality drops below a set level. It is configured using the
link-degrade-monitor statement at
the [edit interfaces interface-name] level.
Supported protocols: Link Fault Signaling (LFS) protocol - Layer 2 and Layer 3 protocols.
Limitations: Existing protocols cannot detect extremely low bit error rates (BER) ranging from 10-13 through 10-5.
Functionality: The system continuously monitors the link’s BER and triggers
corrective action when the BER exceeds a user-defined threshold. This threshold is set
using the thresholds statement at the
[edit interfaces interface-name link-degrade-monitor] level.
When you configure link monitoring (by using the link-degrade-monitor statement),
you can set the following options:
|
Configuration |
Command |
|---|---|
|
BER Threshold Value: Set the BER threshold value at which corrective action triggers on an interface |
|
|
Link Degrade Interval Value: Set the number of consecutive link degradation events before taking corrective action |
|
|
Warning Threshold Value: Set the warning threshold value for link degradation |
|
|
Action on BER Threshold Level: Configure the action taken when the BER threshold level is reached |
|
|
Recovery Type: Choose between automatic or manual recovery |
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Recovery Time Interval: Set the time interval after which automatic recovery of the degraded link triggers |