Dell Force10 S4810P Configuration Manual page 235

Change BGP timers
Use either or both of the following commands in the CONFIGURATION ROUTER BGP mode to
configure BGP timers.
Command Syntax
neighbors {ip-address |
peer-group-name} timers
keepalive holdtime
timers bgp keepalive holdtime
Use the
show config
command in EXEC Privilege mode to view non-default values.
bgp
Timer values configured with the
command.
timers bgp
When two neighbors, configured with different
the resulting values will be as follows:
• the lower of the
• whichever is the lower value; one-third of the new
the new
keepalive
BGP neighbor soft-reconfiguration
Changing routing policies typically requires a reset of BGP sessions (the TCP connection) for the policies
to take effect. Such resets cause undue interruption to traffic due to hard reset of the BGP cache and the
time it takes to re-establish the session. BGP soft reconfig allows for policies to be applied to a session
without clearing the BGP Session. Soft-reconfig can be done on a per-neighbor basis and can either be
inbound or outbound.
BGP Soft Reconfiguration clears the policies without resetting the TCP connection.
Command Mode
CONFIG-ROUTER-BGP
CONFIG-ROUTER-BGP
command in CONFIGURATION ROUTER BGP mode or the
neighbor timers
values is the new
holdtime
value.
Purpose
Configure timer values for a BGP neighbor or peer group.
• keepalive range: 1 to 65535. Time interval, in
seconds, between keepalive messages sent to the
neighbor routers. (Default: 60 seconds)
• holdtime range: 3 to 65536. Time interval, in seconds,
between the last keepalive message and declaring the
router dead. (Default: 180 seconds)
Configure timer values for all neighbors.
• keepalive range: 1 to 65535. Time interval, in
seconds, between keepalive messages sent to the
neighbor routers. (Default: 60 seconds)
• holdtime range: 3 to 65536. Time interval, in seconds,
between the last keepalive message and declaring the
router dead. (Default: 180 seconds)
command override the timer values configured with the
and
keepalive holdtime
value, and
holdtime
value, or the configured
holdtime
show running-config
values, negotiate for new values,
keepalive
Border Gateway Protocol | 235
value is