Users Guide

Command Modes INTERFACE TUNNEL (conf-if-tu)
Supported Modes Full–Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.3(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
Usage Information
A value of 0 copies the inner packet hop limit (ipv6) or time-to-live (ipv4) in the encapsulated packet to the tunnel
header hop limit (ipv6) or time-to-live (ipv4) value.
ip unnumbered
Congure a tunnel interface to operate without a unique explicit IPv4 address and select the interface from which the tunnel will borrow its
address.
Syntax ip unnumbered {interface-type interface-number}
Use the no ip 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 IPv6 address
congured..
Parameters
interface-type
interface-number
Enter the interface type, followed by a slot number.
Defaults None
Command Modes INTERFACE TUNNEL
Supported Modes Full–Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
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 congured.
• 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 ip unnumbered command can specify an interface name that does not yet exist, or does not
yet have a congured IPv6 address. The tunnel interface is not changed to the operationally up state
until logically ip address is identied from the one of the address family.
1330 Tunneling