R0106-HP MSR Router Series MPLS Command Reference(V7)

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Predefined user roles
network-admin
Usage guidelines
LDP establishes LSPs based on the IGP optimal route. If LDP is not synchronized with IGP, MPLS traffic
forwarding might be interrupted. The LDP-IGP synchronization function is used to solve the
synchronization problem.
After LDP-IGP synchronization is enabled, IGP advertises the actual cost of a link only when LDP
convergence on the link is completed. Before LDP is converged, IGP advertises the maximum cost of the
link. As a result, the link is visible on the IGP topology, but IGP does not select the link as the optimal route
when other links are available. In this way, the device can avoid discarding MPLS packets due to lack of
LDP LSP on the optimal route.
LDP-IGP synchronization is not supported for an OSPF process and its OSPF areas if the OSPF process
belongs to a VPN instance.
To enable LDP-OSPF synchronization for an OSPF area, use this command in OSPF area view. To enable
LDP-OSPF synchronization for all areas of an OSPF process, use this command in OSPF view.
Examples
# Enable LDP-OSPF synchronization for OSPF process 1.
<Sysname> system-view
[Sysname] ospf 1
[Sysname-ospf-1] mpls ldp sync
Related commands
• display mpls ldp igp sync
• igp sync delay
• igp sync delay on-restart
• mpls ldp igp sync disable
mpls ldp timer
Use mpls ldp timer to configure the Hello hold time, Hello interval, Keepalive hold time, and Keepalive
interval.
Use undo mpls ldp timer to restore the default.
Syntax
mpls ldp timer { hello-hold timeout | hello-interval interval | keepalive-hold timeout | keepalive-interval
interval }
undo mpls ldp timer { hello-hold | hello-interval | keepalive-hold | keepalive-interval }
Default
The Link Hello hold time is 15 seconds.
The Link Hello interval is 5 seconds.
The Targeted Hello hold time is 45 seconds.
The Targeted Hello interval is 15 seconds.
The Keepalive hold time is 45 seconds.