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CLI-based Configuration Guide - IP Unicast Routing

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R009

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Configuring Path MTU Auto Discovery

Configuring Path MTU Auto Discovery

BGP path maximum transmission unit (MTU) auto discovery can discover the minimum MTU (path MTU) on the network path from the source to the destination so that TCP can transmit BGP messages based on the path MTU.

Pre-configuration Tasks

Before configuring path MTU auto discovery, complete the following task:

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run bgp { as-number-plain | as-number-dot }

    The BGP view is displayed.

  3. Run peer { group-name | ipv4-address } path-mtu auto-discovery

    Path MTU auto discovery is enabled.

    By default, path MTU auto discovery is disabled.

    NOTE:

    The transmit and receive paths between two BGP peers may be different. Therefore, you are advised to run this command on both ends so that the two BGP peers can exchange messages based on the path MTU.

Verifying the Configuration

  • Run the display bgp peer [ ipv4-address ] verbose command to check whether path MTU auto discovery has been successfully configured.

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Updated: 2019-05-17

Document ID: EDOC1000174069

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