Cisco ONS 15454 SDH - Configuring the Wait-To-Restore Timer

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Cisco ONS 15454 and Cisco ONS 15454 SDH Ethernet Card Software Feature and Configuration Guide, R8.0
Chapter 26 Configuring IEEE 802.17b Resilient Packet Ring
Configuring the Wait-to-Restore Timer
To enable and configure the protection timers, perform the following procedure, beginning in global
configuration mode:
Configuring the Wait-to-Restore Timer
When the failure is fixed, a wait-to-restore timer defines how long before the span reverts to its original
state. This timer protects against false negatives in the detection of the failure status, which can avoid
protection-flapping through the use of larger values. Smaller values result in faster recovery times,
however. This timer can be configured between 0 and 1440 seconds, or configured to not recover
automatically. The default for the timer is 10 seconds.
To enable and configure the wait-to-restore timer, perform the following procedure, beginning in global
configuration mode:
Command Purpose
Step 1
Router(config)# interface rpr-ieee 0
Activates interface configuration mode to
configure the RPR-IEEE interface.
Step 2
Router(config-if)# rpr-ieee protection
timer {fast
time | slow time }
Specifies the value of the fast or slow protection
timer:
fast—Ranges from 1 to 20 milliseconds. The
default is 10.
slow—Ranges from 1 to 10 in units of
100 milliseconds. The default is 1
(100 milliseconds).
Step 3
Router(config)# no shut
Enables the RPR-IEEE interface and changes the
mode from the default passthrough.
Step 4
Router(config)# end
Returns to privileged EXEC mode.
Step 5
Router# copy running-config startup-config
(Optional) Saves configuration changes to the
TCC2/TCC2P flash database.
Command Purpose
Step 1
Router(config)# interface rpr-ieee 0
Activates interface configuration mode to
configure the RPR-IEEE interface.
Step 2
Router(config-if)# rpr-ieee protection
wtr-timer {
time | never}
Specifies the value of the wait-to-restore timer:
time—Ranges from 0 to 1440 seconds. The default
is 10.
never—Specifies that protection is never restored
(no revert mode).
Step 3
Router(config)# no shut
Enables the RPR-IEEE interface and changes the
mode from the default passthrough.
Step 4
Router(config)# end
Returns to privileged EXEC mode.
Step 5
Router# copy running-config startup-config
(Optional) Saves configuration changes to the
TCC2/TCC2P flash database.