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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 status is not changed to operationally up
until the logical IP address is identified from the address family.
ipv6 unnumbered
Configure a tunnel interface to operate without a unique IPv6 address and specify the interface from
which the tunnel borrows its address.
Z9500
Syntax ipv6 unnumbered {interface-type slot/port}
To set the tunnel back to default logical address use the no ipv6 unnumbered
command. If the tunnel was previously operational, the tunnel interface remains
operationally down until you also configure the tunnel IPv4 address.
Parameters
interface-type
slot/port
Enter the interface type, followed by a slot and port number.
Defaults None.
Command
Modes
INTERFACE TUNNEL
Command
History
Version Description
9.5(0.1) Introduced on the Z9500.
9.4(0.0) Introduced on the S4810, S4820T, S6000 and Z9000.
9.3(0.1) Introduced on the S6000 and Z9000.
Usage
Information
The ipv6 unnumbered command fails in two conditions:
• If the logical ip address is configured.
• If the tunnel mode is IPv6IP (where an IP address over a tunnel interface is not
supported.
To ping an IPv6-unnumbered tunnels, the logical address route information must
be present at both the source and destination ends of the tunnel.
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 the address family.
1804
Tunneling