DELL S50V User Manual

Border Gateway Protocol IPv4 (BGPv4) | 263

Change BGP timers

Use either or both of the following commands in the CONFIGURATION ROUTER BGP mode to 
configure BGP timers.

Use the 

command in CONFIGURATION ROUTER BGP mode or the 

 command in EXEC Privilege mode to view non-default values.

Timer values configured with the 

 command override the timer values configured with the 

 command.

When two neighbors, configured with different 

 and 

 values, negotiate for new values, the 

resulting values will be as follows:

•

the lower of the 

 values is the new 

 value, and 

•

whichever is the lower value; one-third of the new 

 value, or the configured 

 value is 

the new 

 value.

BGP neighbor soft-reconfiguration

Changing routing policies typically requires a reset of BGP sessions (the TCP connection) for the policies 
to take effect. This type of reset causes undue interruption to traffic due to the hard reset of the BGP cache 
and the time it takes to re-establish the session. 

BGP soft reconfiguration allows you to re-apply policies to a session without resetting the BGP session. 
You can perform soft reconfiguration on a per-neighbor basis for either inbound or outbound policies. BGP 
soft reconfiguration clears and reapplies policies without resetting the TCP connection.

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CONFIG-ROUTER-
BGP

Configure timer values for a BGP neighbor or peer 
group.

•

 range: 1 to 65535. Time interval, in 

seconds, between keepalive messages sent to the 
neighbor routers. (Default: 60 seconds)

•

 range: 3 to 65536. Time interval, in 

seconds, between the last keepalive message and 
declaring the router dead. (Default: 180 seconds)

 

 

 

CONFIG-ROUTER-
BGP

Configure timer values for all neighbors. 

•

 range: 1 to 65535. Time interval, in 

seconds, between keepalive messages sent to the 
neighbor routers. (Default: 60 seconds)

•

 range: 3 to 65536. Time interval, in 

seconds, between the last keepalive message and 
declaring the router dead. (Default: 180 seconds)