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Configuration Guide - IP Unicast Routing

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document describes the configurations of IP Unicast Routing, including IP Routing, Static Route, RIP, RIPng, OSPF, OSPFv3, IPv4 IS-IS, IPv6 IS-IS, BGP, Routing Policy, and PBR.
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Configuring an Update Message Timer

Configuring an Update Message Timer

Context

BGP does not periodically update a routing table. When BGP routes change, BGP updates the changed BGP routes in the BGP routing table by sending Update messages.

  • If a short Update message interval is set, BGP can fast detect route changes. This speeds up BGP network convergence, but increases the number of Update messages on the network and loads of devices, and consumes more network bandwidth resources.
  • If a long Update message interval is set, the number of Update messages on the network is reduced, loads of devices are reduced, and less network bandwidth is consumed. This avoids network flapping. If the Update message interval is too long, BGP is unable to detect route changes in a timely manner. This is unhelpful for implementing rapid BGP network convergence and may cause many packets to be lost.

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

      The BGP-IPv4 unicast address family view is displayed.

    • Run ipv4-family multicast

      The BGP-IPv4 multicast address family view is displayed.

    • Run ipv4-family vpnv4 [ unicast ]

      The BGP-VPNv4 address family view is displayed.

    • Run ipv4-family vpn-instance vpn-instance-name

      The BGP-VPN instance IPv4 address family view is displayed.

    • Run ipv6-family [ unicast ]

      The BGP-IPv6 unicast address family view is displayed.

    • Run ipv6-family vpnv6 [ unicast ]

      The BGP-VPNv6 address family view is displayed.

    • Run ipv6-family vpn-instance vpn-instance-name

      The BGP-VPN instance IPv6 address family view is displayed.

  4. Run peer { ipv4-address | group-name | ipv6-address } route-update-interval interval

    An Update message timer is configured.

    By default, the interval at which Update messages are sent to IBGP peers is 15s, and the interval at which Update messages are sent to EBGP peers is 30s.

  5. Run commit

    The configuration is committed.

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Updated: 2019-04-20

Document ID: EDOC1100074760

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