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NE40E V800R010C00 Configuration Guide - MPLS 01

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Configuring Dynamic BFD for RSVP

Configuring Dynamic BFD for RSVP

This section describes how to configure a dynamic BFD session to detect faults in links between RSVP neighbors.

Usage Scenario

BFD for RSVP is used with TE FRR when a Layer 2 device exists on the primary LSP between a PLR and its downstream RSVP neighbor.

The interval at which a neighbor is declared Down is three times as long as the interval at which RSVP Hello messages are sent. This allows devices to detect a fault in an RSVP neighbor in seconds.

If a Layer 2 device exists on a link between RSVP nodes, an RSVP node cannot rapidly detect a link fault, which results in a great loss of data.

BFD rapidly detects faults in links or nodes on which RSVP adjacencies are deployed. If BFD detects a fault, it notifies the RSVP module of the fault and instructs the RSVP module to switch traffic to a bypass tunnel.

Pre-configuration Tasks

Before you configure BFD for RSVP, configure an RSVP-TE tunnel.

Configuration Procedures

Updated: 2018-07-12

Document ID: EDOC1100028530

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