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Configuration Guide - MPLS

S7700 and S9700 V200R013C00

This document describes the configurations of MPLS, including Static LSP, MPLS LDP, MPLS QoS, MPLS TE, MPLS OAM, Seamless MPLS.
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(Optional) Adjusting BFD Parameters

(Optional) Adjusting BFD Parameters

Context

BFD parameters are adjusted on the ingress node of a TE tunnel using either of the following modes:

Actual local sending interval = MAX { Configured local sending interval, Configured remote receiving interval }

Actual local receiving interval = MAX { Configured remote sending interval, Configured local receiving interval }

Actual local detection interval = Actual local receiving interval x Configured remote detection multiplier

On the egress node of the TE tunnel enabled with the capability of passively creating BFD sessions, the default values of the receiving interval, sending interval and detection multiplier cannot be adjusted. The default values of these three parameters are the minimum configurable values on the egress node. Therefore, the BFD detection interval on the ingress and that on the egress node of a CR-LSP are as follows:

  • Actual detection interval on the ingress = Configured receiving interval on the ingress node x 3

  • Actual detection interval on the egress = Configured sending interval on the ingress x Configured detection multiplier on the ingress node

Perform the following configurations on the ingress node of an MPLS TE tunnel.

Procedure

  • Adjust global BFD parameters.
    1. Run system-view

      The system view is displayed.

    2. Run mpls

      The MPLS view is displayed.

    3. Run mpls te bfd { min-tx-interval tx-interval | min-rx-interval rx-interval | detect-multiplier multiplier } *

      BFD time parameters are adjusted globally.

  • Adjust BFD parameters on the tunnel interface.
    1. Run system-view

      The system view is displayed.

    2. Run interface tunnel interface-number

      The TE tunnel interface view is displayed.

    3. Run mpls te bfd { min-tx-interval tx-interval | min-rx-interval rx-interval | detect-multiplier multiplier } *

      BFD time parameters are adjusted.

      If min-tx-interval tx-interval configured on a local end is different from min-rx-interval rx-interval configured on a remote end, the larger value takes effect.

      The detect-multiplier multiplier value configured on the remote end takes effect.

    4. Run mpls te commit

      The current configurations of the TE tunnel interface are committed.

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Updated: 2019-04-08

Document ID: EDOC1100065745

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