Configuring RSVP-TE Srefresh

Enabling Summary Refresh (Srefresh) on interfaces connecting two RSVP neighboring nodes reduces the network cost and improves network performance. After Srefresh is enabled, retransmission of Srefresh messages will be automatically enabled on interfaces.

Procedure

Run system-view
The system view is displayed.
Run mpls
The MPLS view is displayed.

Srefresh enabled in the MPLS view takes effect on an entire device.
Run mpls rsvp-te srefresh
Srefresh is enabled.
(Optional) Run mpls rsvp-te timer retransmission { increment-value incvalue | retransmit-value retvalue } ^*
The retransmission parameters are set.
(Optional) Enable the summary refresh (Srefresh) forward compatibility.
1. Run quit
  The system view is displayed.
2. Run interface interface-type interface-number
  The view of the interface on which the MPLS TE tunnel is established is displayed.
3. Run mpls rsvp-te srefresh compatible
  The Srefresh forward compatibility is enabled.
When the primary and backup CR-LSPs share the same link, the node on both ends of the link may run different versions. If the upstream nodes run a version earlier than V8 and the downstream node runs V8, Srefresh incompatibility occurs. To address this problem, run the mpls rsvp-te srefresh compatible command on the interface that connects the downstream device to the upstream node to enable Srefresh compatibility.

This command can only be run on a downstream node running V8 when its upstream node runs a version earlier than V8, which ensures that Srefresh can be properly negotiated between the two nodes.
Run commit
The configuration is committed.