signal-degrade-monitor-enable
Syntax
(signal-degrade-monitor-enable | no-signal-degrade-monitor-enable);
Hierarchy Level
[edit interfaces interface-name otn-options preemptive-fast-reroute]
Description
Enable or disable pre-forward error correction (FEC) bit error rate (BER) monitoring.
With pre-FEC BER monitoring enabled, when the configured pre-FEC BER signal degrade threshold is reached, the PIC stops forwarding packets to the remote interface and raises an interface alarm. Ingress packets continue to be processed. If pre-FEC BER monitoring is used with MPLS fast reroute or another link protection method, then traffic is rerouted to a different interface.
You can also configure backward fast reroute to insert local
pre-FEC BER status into transmitted OTN frames, notifying the remote
interface of signal degradation. The remote interface can use the
information to reroute traffic to a different interface. If you use
pre-FEC BER monitoring together with backward fast reroute, then notification
of signal degradation and rerouting of traffic occurs in less time
than that required through a Layer 3 protocol. To configure backward
fast reroute, include the backward-frr-enable statement at the same hierarchy level.
When you configure pre-FEC BER signal degrade monitoring,
we recommend that you configure both the signal-degrade-monitor-enable and backward-frr-enable statements.
You can also configure the pre-FEC BER thresholds that raise
or clear a signal degrade alarm and the time interval for the thresholds.
If the BER thresholds and interval are not configured, the default
values are used. Include the ber-threshold-signal-degrade value, ber-threshold-clear value, and interval value statements
at the [edit interfaces interface-name otn-options signal-degrade] hierarchy level to configure the
BER thresholds and time interval. See Understanding Pre-FEC BER Monitoring and BER Thresholds for more information about pre-FEC BER monitoring and determining
BER threshold settings.
Default
By default, pre-FEC BER signal degrade monitoring is disabled.
Options
signal-degrade-monitor-enable—Enable
pre-FEC BER signal degrade monitoring.
no-signal-degrade-monitor-enable—Do not enable
pre-FEC BER signal degrade monitoring.
Required Privilege Level
interface—To view this statement in the configuration.
interface-control—To add this statement to the configuration.
Release Information
Statement introduced in Junos OS Release 13.2.