ipv6 unnumbered

Configure a tunnel interface to operate without a unique IPv6 address and select the interface from which the tunnel borrows its address.

Syntax

ipv6 unnumbered {interface-type interface-number}

To set the tunnel back to default logical address use the no ipv6 unnumbered command. If the tunnel was previously operational, the tunnel interface is operationally down unless you also configure the tunnel IPv4 address.

Parameters

Defaults

Command Modes

Command History

interface-type interface- number

interface-type interface- number

None.

INTERFACE TUNNEL

Version

9.7(0.0)

9.3(0.1)

9.4(0.0)

Enter the interface type, followed by the type, slot and port information.

(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

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 ipv6 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.

The ipv6 unnumbered command will fail if the tunnel interface already has an explicit IPv6 address assigned. Likewise the ipv6 address command will fail if ipv6 unnumbered is already configured. While unlikely, an interface can be configured to be ipv6 unnumbered for IPv6 while also having an explicit IPv4 address.

Tunneling

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Dell 9.7(0.0) manual Ipv6 unnumbered, Version 70.0 30.1 40.0