Description: Set keep-alive on an interface.
Syntax: keepalive
<timer-value>
no keepalive
timer-value The number of seconds
this router waits before sending the next keepalive message to a
peer. Valid values are integers from 0 to 32767.
Description: Keepalive messages
check the health of a link. The keepalive timer is the number of
seconds a router waits between sending keepalive messages to a peer.
If no response from the peer is received, the local router
retransmits the keepalive message up to five times. If no response
is received from the peer, the local router brings down the link and
withdraws the route from the routing table.
Instructions:
1. Enter into Interface serial 0 Config mode
2. Set keepalive Parameter of interface serial 0 to 15 seconds
3. Type the show Command to see that keepalive parameter of interface serial 0 is set with 15
R1>enable
R1#configure terminal
R1(config)#interface serial 0
R1(config-if)#keepalive 15
R1#show interfaces serial 0
