Alcatel-Lucent 6850-48 参照ガイド
BGP Commands
OmniSwitch CLI Reference Guide
September 2009
page 44-65
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.
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 6850, 6855, 9000, 9000E
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).
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.
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 6.1; command was introduced.