ipv6 unnumbered
Configure a tunnel interface to operate without a unique explicit IPv6 address and select the interface
from which the tunnel will borrow its address.
Syntax
ipv6 unnumbered
{interface-type interface-number}
Use the
no
ipv6 unnumbered
command to set the tunnel back to default logical
address. If the tunnel was previously operational, this will make the tunnel interface
operationally down, unless the tunnel also has an IPv4 address configured.
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 9.4(0.0)
Introduced on the MXL.
Usage
Information
The ip unnumbered command will fail in two condition:
• If the logical ip address is configured.
• If the tunnel mode is ipv6ip (where ip address over tunnel interface is not
possible).
To ping the unnumbered tunnels the logical address route information should be
present in both the ends.
NOTE: The ipv6 unnumbered command can specify an interface name that
does not yet exist, or does not yet have a configured IPv6 address. But the
tunnel interface will not go operationally up until it has determined a logical
address to use of at least one address family.
Tunneling
1303