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Dell PowerEdge FN I/O Module Command Line Reference Guide 9.10(0.0)

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ip unnumbered

Configure 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 configured..

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 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 ip unnumbered command can specify an interface name that does not yet exist, or does not yet have a configured IPv6 address. The tunnel interface is not changed to the operationally up state until logically ip address is identified from the one of the address family.

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