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Configuration Guide - IP Unicast Routing

S7700 and S9700 V200R010C00

This document describes IP Unicast Routing configurations supported by the switch, including the principle and configuration procedures of IP Routing Overview, Static Route, RIP, RIPng, OSPF, OSPFv3, IS-IS(IPv4), IS-IS(IPv6), BGP, Routing Policy ,and PBR, and provides 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 switches 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.

    NOTE:

    You cannot use the peer route-policy command on BGP peers to apply routing policies to set the BGP priority.

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Updated: 2019-08-21

Document ID: EDOC1000141900

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