Configuring an RSVP Resource Reservation Style

Context

If multiple CR-LSPs pass through the same node, the ingress nodes can be configured with an RSVP resource reservation style to allow the CR-LSPs to share reserved resources or use separate reserved resources on the overlapping node.

A reservation style is used by an RSVP node to reserve resources after receiving resource reservation requests from upstream nodes. The device supports the following reservation styles:

Fixed filter (FF): creates an exclusive reservation for each sender. A sender does not share its resource reservation with other senders, and each CR-LSP on a link has a separate resource reservation.
SE: creates a single reservation for a series of selected upstream senders. CR-LSPs on a link share the same resource reservation.

The SE style is used for tunnels established using the Make-Before-Break mechanism, whereas the FF style is seldom used.

Perform the following configurations on the ingress node of an MPLS TE tunnel.

Procedure

Run system-view
The system view is displayed.
Run interface tunnel tunnel-number
The tunnel interface view is displayed.
Run mpls te resv-style { ff | se }
A resource reservation style is configured.

The default resource reservation style is SE.
Run mpls te commit
The configuration is committed.