Dell Command Line Reference Guide for the S4048–ON System 9.14.2.4

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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
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

This guide is platform-specific. For command information about other platforms, see the relevant Dell EMC Networking OS Command Line Reference Guide.

Version
Description
9.10(0.1)
Introduced on the S6010-ON and S4048T-ON.
9.10(0.0)
Introduced on the S3148.
9.10(0.0)
Introduced on the S6100–ON.
9.8(2.0)
Introduced on the S3100 series.
9.8(1.0)
Introduced on the Z9100–ON.
9.8(0.0P5)
Introduced on the S4048-ON.
9.8(0.0P2)
Introduced on the S3048-ON.
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 into a keepalive down state that does not clear in a few seconds, then performing shutdown - no shutdown sequence on one end should bring both ends back to up.


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