Skip to main content
Sign Out

Welcome to Dell

My Account
  • Place orders quickly and easily
  • View orders and track your shipping status
  • Create and access a list of your products
  • Manage your Dell EMC sites, products, and product-level contacts using Company Administration.
Sign In Create an Account Premier Sign In Partner Program Sign In
Contact Us

Dell EMC Configuration Guide for the S4048T–ON System 9.14.2.4

PDF

Changing BGP keepalive and hold timers

BGP uses timers to control the activity of sending the keepalive messages to its neighbors or peers. Also, you can adjust the interval of how long the device has to wait for a keepalive messge from a neighbor before declaring the peer dead. To configure BGP timers, use either or both of the following commands.

To change the BGP timers for all neighbors, use timers bgp command. To change the BGP keepalive and holdtime timers for a specific neighbor or peer, use the neighbor timers command.

NOTE Timer values configured with the neighbor timers command override the timer values configured with the timers bgp command.
When two neighbors, configured with different keepalive and holdtime values, negotiate for new values, the resulting values are as follows:
  • the lower of the holdtime values is the new holdtime value, and
  • whichever is the lower value; one-third of the new holdtime value, or the configured keepalive value is the new keepalive value.
  • Configure timer values for a BGP neighbor or peer group.
    CONFIG-ROUTER-BGP mode
    neighbors {ip-address | ipv6-address | peer-group-name} timers keepalive holdtime
    • keepalive: Time interval, in seconds, between keepalive messages sent to the neighbor routers. The range is from 1 to 65535. The default is 60 seconds.
    • holdtime: Time interval, in seconds, between the last keepalive message and declaring the BGP peer is dead. The range is from 3 to 65536. The default is 180 seconds.
  • Configure timer values for all neighbors.
    CONFIG-ROUTER-BGP mode
    timers bgp keepalive holdtime
    • keepalive: Time interval, in seconds, between keepalive messages sent to the neighbor routers. The range is from 1 to 65535. The default is 60 seconds.
    • holdtime: Time interval, in seconds, between the last keepalive message and declaring the BGP peer is dead. The range is from 3 to 65536. The default is 180 seconds.

Example configuration of BGP keepalive and hold timers

DellEMC# configure terminal
DellEMC(conf)# router bgp 400
DellEMC(conf-router_bgp)# network 10.1.1.0 mask 255.255.255.0
DellEMC(conf-router_bgp)# timers bgp 80 120
DellEMC(conf-router_bgp)# exit

In the above example configuration, the BGP timers are set with keepalive time as 80 seconds with which the system sends keepalive messages to the BGP peer and holdtime as 120 seconds with which the system waits for a message from the BGP peer before concluding that the peer is dead.

To view non-default values, use the show config command in CONFIGURATION ROUTER BGP mode or the show running-config bgp command in EXEC Privilege mode.

Rate this content

Accurate
Useful
Easy to understand
Was this article helpful?
0/3000 characters
  Please provide ratings (1-5 stars).
  Please provide ratings (1-5 stars).
  Please provide ratings (1-5 stars).
  Please select whether the article was helpful or not.
  Comments cannot contain these special characters: <>()\