Alcatel-Lucent 060321-10, Rev. B, Справочное руководство CLI

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ip bgp neighbor auto-restart BGP Commands
page 19-66 OmniSwitch CLI Reference Guide March 2011
ip bgp neighbor auto-restart
Enables or disables BGP peer automatic restart. When enabled, this peer will automatically attempt to
restart a session with another peer after a session with that peer terminates. When disabled, this peer will
not try to re-establish a session with another peer after the session terminates; in such a case, the other peer
will have to restart the session for the two peers to resume communication.
ip bgp neighbor ip_address auto-restart
Syntax Definitions
ip_address 32-bit IP address for the neighbor.
Defaults
This command is enabled by default.
Platforms Supported
OmniSwitch 10K
Usage Guidelines
•
Use the no form of this command to disable automatic peer restart.
•
After a session with another peer terminates, the local BGP speaker will wait 60 seconds before
attempting to restart the session. If the session does not start on the first attempt a second attempt will
be made after another 120 seconds (60x2). On each unsuccessful session attempt, the previous delay
between restarts is multiplied by 2, up to a maximum delay of 240 seconds. An exception to this rule
occurs when the peer session terminates on receipt of a NOTIFY message with 'unsupported option'
code or 'unsupported capability' code; in these cases the delay between restart attempts will begin at 1
second and multiply by 2 after each unsuccessful restart attempt (up to a maximum of 240 second
delay).
•
Disabling this option can be helpful in cases where other peers are prone to frequent flapping or send-
ing many NOTIFY messages. By not restarting sessions with unstable neighbors, the local BGP
speaker forces those unstable neighbors to re-initialize the connection.
Examples
-> ip bgp neighbor 172.22.2.115 auto-restart
-> no ip bgp neighbor 172.22.2.115 auto-restart
Release History
Release 7.1.1; command was introduced.