Configuring Basic SR-MPLS TE Functions

This section describes how to configure basic SR-MPLS TE functions.

Context

SR-MPLS TE uses strict and loose explicit paths. Strict explicit paths use adjacency SIDs, and loose explicit paths use adjacency and node SIDs. Before an SR-MPLS TE tunnel is configured, the adjacency and node SIDs must be configured.

Procedure

Configure an SRGB range.
1. Run system-view
  The system view is displayed.
2. Run isis [ process-id ]
  The IS-IS view is displayed.
3. Run network-entity net-addr
  A network entity title (NET) is configured.
4. Run cost-style { wide | compatible | wide-compatible }
  The IS-IS wide metric function is enabled.
5. Run traffic-eng [ level-1 | level-2 | level-1-2 ]
  IS-IS TE is enabled.
6. Run segment-routing mpls
  The IS-IS Segment Routing function is enabled.
7. Run segment-routing global-block begin-value end-value [ ignore-conflict ]
  An SRGB range is configured for the current IS-IS instance.
  
  If a label in the SRGB range to be specified is in use, you can select the ignore-conflict parameter to allow configuration delivery. However, the configuration does not take effect until the device is restarted and the label is released. In normal cases, specifying ignore-conflict is not recommended.
8. Run commit
  The configuration is committed.
9. Run quit
  Return to the system view.
Set an SR prefix SID.
1. Run interface loopback loopback-number
  A loopback interface is created, and the loopback interface view is displayed.
2. Run isis enable [ process-id ]
  The IS-IS interface is enabled.
3. Run ip address ip-address { mask | mask-length }
  The IP address is configured for the loopback interface.
4. Run isis prefix-sid { absolute sid-value | index index-value } [ node-disable ]
  An SR prefix SID is configured for the IP address of the interface.
5. Run commit
  The configuration is committed.