Administrator Guide

Layer 3 Routing Commands 1408
• 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.
The new values are not applied to adjacencies already in the ESTABLISHED
state. A new keepalive or hold time is applied the next time an adjacency is
formed.
Command History
Introduced in version 6.2.0.1 firmware.
Example
console(config-router)#timers bgp 1000 500