ip unnumbered

Configure a tunnel interface to operate without a unique IPv4 address and select the interface from which the tunnel borrows its address.

Syntax

ip unnumbered {interface-type interface-number}

Parameters

To set the tunnel back to default logical address use the no ip unnumbered command. If the tunnel was previously operational, the tunnel interface is operationally down unless you also configure the tunnel IPv6 address.

interface-type

Enter the interface type, followed by a slot number.

interface-

 

number

 

Defaults

Command Modes

Command History

interface-type interface- number

None

INTERFACE TUNNEL

Version

9.7(0.0)

9.3(0.1)

9.4(0.1)

(OPTIONAL) Instead of entering the keyword interface followed by the interface type, slot and port information, as above, you can enter the interface type, followed by just a slot number.

Description

Introduced on the S6000-ON.

Introduced on the S6000 and Z9000.

Introduced on the S4810, S4820T, S6000 and Z9000.

Usage Information

The ip unnumbered command fails in two conditions:

•If the logical ip address is configured.

•If Tunnel mode is ipv6ip (where ip address over tunnel interface is not possible).

To ping the unnumbered tunnels, the logical address route information must be present at both the ends.

NOTE: The ip unnumbered command can specify an interface name that does not exist or does not have a configured IPv6 address. The tunnel interface is not changed to operationally up until the logical ip address is identified from one of the address family.

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Tunneling

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Dell 9.7(0.0) manual Ip unnumbered, Interface-type interface- number, Version 70.0 30.1 40.1