Configuring an IS-IS SR-MPLS TE Tunnel (Explicit Path Used)

If no controller is deployed to compute paths, an explicit path can be manually configured to perform segment routing-traffic engineering (SR-MPLS TE).

Usage Scenario

SR-MPLS TE is a new TE tunnel technology that uses SR as a control protocol. If no controller is deployed for path computation, an explicit path can be manually configured to achieve SR-MPLS TE.

Pre-configuration Tasks

Before configuring an IS-IS SR-MPLS TE tunnel, configure IS-IS to implement network layer connectivity.

Enabling MPLS TE: Enabling MPLS TE on each node in an SR-MPLS domain is the prerequisites for configuring an SR-MPLS TE tunnel.

Globally Enabling the SR Capability: Globally enabling the SR capability on forwarders is a prerequisite for configuring an SR-MPLS TE tunnel.

Configuring Basic SR-MPLS TE Functions: This section describes how to configure basic SR-MPLS TE functions.

Configuring an SR-MPLS TE Explicit Path: An explicit path over which an SR-MPLS TE tunnel is to be established is configured on the ingress. You can specify node or link labels for the explicit path.

Configuring an SR-MPLS TE Tunnel Interface: A tunnel interface must be configured on an ingress so that the interface is used to establish and manage an SR-MPLS TE tunnel.

Configuring the UCMP Function of the SR-MPLS TE Tunnel: When multiple SR-MPLS TE tunnels are directed to the downstream device, the load balancing weights can be configured to perform the Unequal Cost Multi-Path Load Balance (UCMP) on the SR-MPLS TE tunnels.

Verifying the IS-IS SR-MPLS TE Tunnel Configuration: After configuring an automatic SR-MPLS TE tunnel, verify information about the SR-MPLS TE tunnel and its status statistics.