backward-frr-enable
Syntax
(backward-frr-enable | no-backward-frr-enable);
Hierarchy Level
[edit interfaces interface-name otn-options preemptive-fast-reroute]
Description
Enable or disable backward fast reroute status insertion.
Enable backward fast reroute to insert local pre-forward error
correction (FEC) bit error rate (BER) status into transmitted OTN
frames, notifying the remote interface. The remote interface can use
the information to reroute traffic to a different interface. When
you enable backward fast reroute and also enable pre-FEC BER monitoring
including the signal-degrade-monitor-enable statement, notification of signal degradation and rerouting
of traffic occurs in less time than that required through a Layer
3 protocol.
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, backward fast reroute insertion is disabled.
Options
backward-frr-enable—Enable
backward fast reroute status insertion.
no-backward-frr-enable—Do not enable backward
fast reroute status insertion.
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.