DELL 9.8(0.0) User Manual

tunnel keepalive

Configure the tunnel keepalive target, interval and attempts.

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

Enter the IPv4 or IPv6 address of the peer to which 
the keepalive probes will be sent.

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.

(OPTIONAL) Enter the keyword count to count packets 
processed by the filter.

The range is from 3 to 10. The default is 3.

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

9.7(0.0)

Introduced on the S6000-ON.

9.5(0.1)

Introduced on the Z9500.

9.4(0.0)

Introduced on the S4810, S4820T, S6000 and Z9000.

Usage 
Information

Enabling tunnel keepalive causes ICMP echo packets to be sent to the keepalive 
target. The ICMP echo will be sourced from the tunnel interface logical IPv4 or 
IPv6 address and will be tunnel encapsulated.  The response will be accepted 
whether it returns tunnel encapsulated or not.

When configuring tunnel keepalive at both end points of a tunnel interface it is 
recommended to set the tunnel keepalive target to the logical IPv4 or IPv6 address 
of the far end tunnel peer, rather than to the tunnel destination.  This reduces the 
chance of both ends of the tunnel staying in keepalive down state. If both ends get 

1814

Tunneling