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NE40E V800R010C00 Configuration Guide - MPLS 01

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Configuring MPLS TE Auto FRR

Configuring MPLS TE Auto FRR

MPLS TE Auto FRR is a local protection mechanism that protects traffic on a link or a node on a CR-LSP.

Usage Scenario

On a network that requires high reliability, FRR is configured to improve network reliability. If the network topology is complex and a great number of links must be configured, the configuration procedure is complex.

Auto FRR automatically establishes an eligible bypass tunnel, which simplifies configurations.

MPLS TE Auto FRR, similar to MPLS TE manual FRR, can be performed in the RSVP GR process. For details about MPLS TE manual FRR, see Configuring MPLS TE Manual FRR.

NOTE:

Only a primary CR-LSP supports MPLS TE Auto FRR.

In this example, a bypass tunnel with a higher priority is available on the NE40E. MPLS TE Auto FRR automatically deletes a binding between a primary tunnel and a bypass tunnel with a lower priority and binds the primary tunnel to another bypass tunnel with a higher priority. A bypass tunnel has a higher priority than another based on the following conditions in descending order:
  • SRLG

    In MPLS TE Auto FRR, if the shared risk link group (SRLG) attribute is configured, the primary and bypass tunnels must be in different SRLGs. If they are in the same SRLG, the bypass tunnel cannot be established.

  • Bandwidth protection takes precedence over non-bandwidth protection.
  • Node protection takes precedence over link protection.
  • Manual protection takes precedence over auto protection.

Pre-configuration Tasks

Before configuring MPLS TE Auto FRR, complete the following tasks:

  • Set up a primary RSVP-TE tunnel.

  • Enable MPLS, MPLS TE, and RSVP-TE in the system and interface views on every node along a bypass tunnel. (See Enabling MPLS TE and RSVP-TE.)

  • (Optional) Configure the physical bandwidth for a bypass tunnel if the primary tunnel bandwidth needs to be protected. (See (Optional) Configuring TE Attributes.)

  • Enable CSPF on the ingress and transit nodes along a primary tunnel.

Configuration Procedures

Figure 3-10  MPLS TE Auto FRR configuration
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Updated: 2018-07-12

Document ID: EDOC1100028530

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