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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.
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
interface-type
interface-
number
Enter the interface type, followed by the type, slot and port
information.
Defaults None.
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.
9.3(0.1) Introduced on the 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 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.
Tunneling
1809