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Configuring CR-LSP Backup
CR-LSP backup provides an end-to-end protection mechanism. If a primary CR-LSP fails, traffic rapidly switches to a backup CR-LSP, ensuring uninterrupted traffic transmission.
Pre-configuration Tasks
Before configuring CR-LSP backup, complete the following tasks:![]()
- Configure a dynamic MPLS TE or DS-TE tunnel. For details, seeConfiguring a Dynamic MPLS TE Tunnel.
- Enable MPLS, MPLS TE, and RSVP-TE globally and on interfaces of each node along a backup CR-LSP.
If CR-LSP hot standby is configured, perform the operation of Configuring Static BFD for CR-LSPs to implement fast switching at the millisecond level.
- Creating a Backup CR-LSP
- (Optional) Configuring Forcible Switchover
- (Optional) Configuring CSPF Fast Switching
The CSPF fast switching function enables Hot-standby to switch quickly. - (Optional) Configuring Dynamic Bandwidth for Hot-Standby CR-LSPs
- (Optional) Configuring a Best-Effort Path
- Verifying the CR-LSP Backup Configuration