Reference Guide

Usage Information
A value of 0 copies the inner packet hop limit (ipv6) or time-to-live (ipv4) in the
encapsulated packet to the tunnel header hop limit (ipv6) or time-to-live (ipv4)
value.
tunnel keepalive
Configure the tunnel keepalive target, interval and attempts.
C9000 Series
Syntax
tunnel keepalive {ip-address | ipv6-address}[interval
{seconds}] [attempts {count | unlimited}]
To disable the tunnel keepalive probes use the no tunnel keepalive command.
Parameters
ip-address ipv6
address
Enter the IPv4 or IPv6 address of the peer to which
the keepalive probes will be sent.
interval seconds
Enter the keyword interval then the interval time, in
seconds, after which the restart process to keepalive probe
packets.
The range is from 5 to 255. The default is 5.
count
(OPTIONAL) Enter the keyword count to count packets
processed by the filter.
The range is from 3 to 10. The default is 3.
unlimited
Enter the keyword unlimited to specify the unlimited
number of keepalive probe packets.
Defaults Tunnel keepalive is disabled.
Command Modes INTERFACE TUNNEL
Command History
Version Description
9.9(0.0) Introduced on the C9010.
9.7(0.0) Introduced on the S6000-ON.
9.4(0.0) Introduced on the S4810, S4820T, S6000 and Z9000.
2026
Tunneling Commands