GRE Tunnel Keepalives

Router# configure terminal
Router(config)#interface tunnel0
Router(config-if)#keepalive 5 4          

!--- The syntax of this command is keepalive [seconds [retries]].

!--- Keepalives are sent every 5 seconds and 4 retries.
!--- Keepalives must be missed before the tunnel is shut down.
!--- The default values are 10 seconds for the interval and 3 retries.

Document ID: 64565