Cisco ASR 9000 Series Configuration Manual page 50

Setting Up LDP NSF Using Graceful Restart
DETAILED STEPS
Command or Action
Step 1
configure
Example:
RP/0/RSP0/CPU0:router# configure
Step 2 mpls ldp
Example:
RP/0/RSP0/CPU0:router(config)# mpls ldp
Step 3 interface type interface-path-id
Example:
RP/0/RSP0/CPU0:router(config-ldp)#
interface POS 0/1/0/0
RP/0/RSP0/CPU0:router(config-ldp-if)#
Step 4
exit
Example:
RP/0/RSP0/CPU0:router(config-ldp-if)# exit
Step 5 graceful-restart
Example:
RP/0/RSP0/CPU0:router(config-ldp)#
graceful-restart
Step 6 graceful-restart forwarding-state-holdtime
seconds
Example:
RP/0/RSP0/CPU0:router(config-ldp)#
graceful-restart forwarding-state-holdtime
180
Step 7 graceful-restart reconnect-timeout seconds
Example:
RP/0/RSP0/CPU0:router(config-ldp)#
graceful-restart reconnect-timeout 169
Cisco ASR 9000 Series Aggregation Services Router MPLS Configuration Guide, Release 4.3.x
34
Implementing MPLS Label Distribution Protocol
Purpose
Enters global configuration mode.
Enters MPLS LDP configuration mode.
Enters interface configuration mode for the LDP protocol.
Exits the current configuration mode.
Enables the LDP graceful restart feature.
Specifies the length of time that forwarding can keep LDP-installed
forwarding states and rewrites, and specifies wh en the LDP control
plane restarts.
• After restart of the control plane, when the forwarding state
holdtime expires, any previously installed LDP forwarding
state or rewrite that is not yet refreshed is deleted from the
forwarding.
• Recovery time sent after restart is computed as the current
remaining value of the forwarding state hold timer.
Specifies the length of time a neighbor waits before restarting the
node to reconnect before declaring an earlier graceful restart session
as down. This command is used to start a timer on the peer (upon
a neighbor restart). This timer is referred to as Neighbor Liveness
timer.
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