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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 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.

    4. Run commit

      The configuration is committed.

  • 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.

    4. Run commit

      The configuration is committed.

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Updated: 2019-04-20

Document ID: EDOC1100074760

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