Configuring A Span Shutdown; Configuring Keepalive Events - Cisco ONS 15454 SDH Configuration Manual

Configuring a Span Shutdown

Configuring a Span Shutdown
The rpr-ieee shutdown command performs the same task as the rpr-ieee protection request
forced-switch command.
To cause a forced switch on the span of the interface, perform the following procedure, beginning in
global configuration mode:
Command
Step 1
Router(config)# interface rpr-ieee 0
Step 2
Router(config-if)# rpr-ieee shutdown {east
| west}
Step 3
Router(config)# end
Step 4
Router# copy running-config startup-config

Configuring Keepalive Events

A station receives fairness messages from a link to determine its status. When the number of
milliseconds that pass without receiving a fairness message from the neighboring stations exceeds a
specified timer, a keepalive event is triggered. The keepalive event generates a protection event.
The timer can have a different value on each span and must be greater than or equal to the hold-off timer.
This feature is independent of the fairness algorithm itself, but is still a function performed by the
fairness machine.
To enable and configure the keepalives, perform the following procedure, beginning in global
configuration mode:
Command
Step 1
Router(config)# interface rpr-ieee 0
Step 2
Router(config-if)# rpr-ieee keepalive-timer
milliseconds [east | west]
Step 3
Router(config)# no shut
Cisco ONS 15454 and Cisco ONS 15454 SDH Ethernet Card Software Feature and Configuration Guide, R8.0
26-14
Chapter 26 Configuring IEEE 802.17b Resilient Packet Ring
Purpose
Activates interface configuration mode to
configure the RPR-IEEE interface.
Causes a forced switch on a specified span of the
interface.
Returns to privileged EXEC mode.
(Optional) Saves configuration changes to the
TCC2/TCC2P flash database.
Purpose
Activates interface configuration mode to
configure the RPR-IEEE interface.
Specifies the amount of time that can pass before
a keepalive event is triggered after not receiving a
fairness message from a neighboring station.
Values range from 2 to 200 milliseconds. The
default is 3 milliseconds.
(Optional) You can also specify the east or west
ringlet.
The number of milliseconds for the
Caution
keepalive timer must be higher than the
number of milliseconds for the holdoff
timer.
Enables the RPR-IEEE interface and changes the
mode from the default passthrough.