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Configuration Guide - IP Unicast Routing

S1720, S2700, S5700, and S6720 V200R011C10

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 a BGP ConnectRetry Timer

Configuring a BGP ConnectRetry Timer

Context

After BGP initiates a TCP connection, the ConnectRetry timer will be stopped if the TCP connection is established successfully. If the first attempt to establish a TCP connection fails, BGP tries again to establish the TCP connection after the ConnectRetry timer expires.
  • Setting a short ConnectRetry interval reduces the period BGP waits between attempts to establish a TCP connection. This speeds up the establishment of the TCP connection.
  • Setting a long ConnectRetry interval suppresses routing flapping caused by peer relationship flapping.

A ConnectRetry timer can be configured either for all peers or peer groups, or for a specific peer or peer group. A ConnectRetry timer configured for a specific peer takes precedence over that configured for the peer group of this peer. In addition, a ConnectRetry timer configured for a specific peer or peer group takes precedence over that configured for all peers or peer groups.

Procedure

  • Configure a BGP ConnectRetry timer for all peers or peer groups.
    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 timer connect-retry connect-retry-time

      A BGP ConnectRetry timer is configured for all peers or peer groups.

      By default, the ConnectRetry timer value is 32s.

  • Configure a ConnectRetry timer for a specific peer or peer group.
    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 | ipv6-address } timer connect-retry connect-retry-time

      A ConnectRetry timer is configured for a specific peer or peer group.

      By default, the ConnectRetry timer value is 32s.

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Updated: 2019-10-21

Document ID: EDOC1000178171

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