Configuration Roadmap

Figure 1 MPLS TE topology

The configuration roadmap is as follows:

1. Enable MPLS TE.
2. Globally enable MPLS, MPLS TE and MPLS TE CSPF on each node along TE tunnels, and deploy MPLS and MPLS TE on each interface along the TE tunnels.
3. Configure tunnel paths, enable each node to use primary and backup TE tunnels, and configure primary and backup CR-LSPs using the affinity attribute.
4. Create L3VPN service tunnels.

   1. Create primary tunnels.

      • Create primary tunnel TE1 between Site2_UPE3 and Core_SPE2. Specify path 1 as the primary CR-LSP and path 2 as the backup CR-LSP.
      • Create primary tunnel TE3 between Site2_UPE4 and Core_SPE3. Specify path 5 as the primary CR-LSP and path 6 as the backup CR-LSP.

   2. Create backup tunnels.

      • Create backup tunnel TE2 between Site2_UPE3 and Core_SPE3, which is the backup tunnel of primary tunnel TE1. Specify path 3 as the primary CR-LSP and path 4 as the backup CR-LSP.
      • Create backup tunnel TE4 between Site2_UPE4 and Core_SPE2, which is the backup tunnel of primary tunnel TE3. Specify path 7 as the primary CR-LSP and path 8 as the backup CR-LSP.

   3. Configure RSVP GR.

      Enable RSVP GR on all devices to prevent network disconnection and recover dynamic CR-LSPs upon switchovers on RSVP nodes.

   4. Configure BFD for CR-LSP.

      Configure static BFD for CR-LSP on all devices to speed up switchovers of the primary and backup CR-LSPs.

5. Create a tunnel policy.

   Configure TE tunnels to be preferentially selected.