CLI Guide

Layer 3 Routing Commands 1419
console(config-rtr-tmplt)# exit
console(config-router)# neighbor 172.20.1.2 inherit peer AGGR
console(config-router)# neighbor 172.20.2.2 inherit peer AGGR
console(config-router)# address-family ipv6
console(config-router)# neighbor 172.20.1.2 activate
console(config-router)# neighbor 172.20.2.2 activate
timers bgp
The timers bgp command configures the default keepalive and hold timers
that BGP uses for all neighbors unless specifically overridden by the neighbor
timers command.
Syntax
timers bgp keepalive holdtime
no timers bgp
• keepalive—The time, in seconds, between BGP KEEPALIVE packets sent
to a neighbor. The range is 0 to 65,535 seconds. An small internal jitter is
applied to the keepalive interval timer in order to reduce the CPU load
that may occur when multiple timers expire simultaneously.
• holdtime—The time, in seconds, that BGP continues to consider a
neighbor to be alive without receiving a BGP KEEPALIVE or UPDATE
packet from the neighbor. If no KEEPALIVE is received from a neighbor
for longer than the hold time, BGP drops the adjacency. If the hold time is
set to 0, then BGP does not enforce a hold time and BGP does not send
periodic KEEPALIVE messages. The range is 0, 3 to 65,535 seconds.
Default Configuration
The default keepalive time is 30 seconds. The default hold time is 90 seconds.
Command Mode
BGP Router Configuration mode
User Guidelines
When BGP establishes an adjacency, the neighbors agree to use the
minimum hold time configured on either neighbor. BGP sends KEEPALIVE
messages at either 1/3 of the negotiated hold time or the configured keepalive
interval, whichever is more frequent.