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CLI-based Configuration Guide - IP Unicast Routing

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R010

This document describes the concepts and configuration procedures of IP Service features on the device, and provides the configuration examples.
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Configuring the BGP Priority

Configuring the BGP Priority

Context

The routing protocols may share and select routing information because routers may run multiple dynamic routing protocols at the same time. The system sets a default priority for each routing protocol. When multiple routing protocols are used to select routes, the route selected by the routing protocol with a higher priority takes effect.

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. Enter the corresponding address family view based on network type to configure BGP devices on networks.

    • Run ipv4-family { unicast | multicast }

      The IPv4 address family view is displayed.

    • Run ipv6-family [ unicast ]

      The IPv6 address family view is displayed.

  4. Run preference { external internal local | route-policy route-policy-name } or preference external internal local route-policy route-policy-name

    The BGP priority is set.

    The default BGP priority is 255.

    The smaller the preference value, the higher the preference.

    BGP has the following types of routes:

    • EBGP routes learned from peers in other ASs

    • IBGP routes learned from peers in the same AS

    • Locally originated routes (A locally originated route is a route summarized by using the summary automatic command or the aggregate command.)

    Different preference values can be set for these three types of routes.

    In addition, a routing policy can also be used to set the preferences for the routes that match the policy. The routes that do not match the policy use the default preference.

    If both external internal local and route-policy route-policy-name are specified in the command, the priority of the routes that match the route-policy is set based on the route-policy, and the priorities of other routes are set based on the external internal local configuration.

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Updated: 2019-05-20

Document ID: EDOC1100034072

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