Label Distribution Protocol
7210 SAS M, T, X, R6, Mxp MPLS Configuration Guide Page 257
Configuring Graceful-Restart Helper Parameters
Graceful-restart helper advertises to its LDP neighbors by carrying the fault tolerant (FT) session
TLV in the LDP initialization message, assisting the LDP in preserving its IP forwarding state
across the restart. Alcatel-Lucent’s recovery is self-contained and relies on information stored
internally to self-heal. This feature is only used to help third-party routers without a self-healing
capability to recover.
Maximum recovery time is the time (in seconds) the sender of the TLV would like the receiver to
wait, after detecting the failure of LDP communication with the sender.
Neighbor liveness time is the time (in seconds) the LSR is willing to retain its MPLS forwarding
state. The time should be long enough to allow the neighboring LSRs to re-sync all the LSPs in a
graceful manner, without creating congestion in the LDP control plane.
Use the following syntax to configure graceful-restart parameters:
CLI Syntax: config>router>ldp
[no] graceful-restart
[no] maximum-recovery-time interval
[no] neighbor-liveness-time interval
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