Statically Associating the Shared IP Interface with the Layer 2 Interface

You can specify the layer 2 interface used by a shared IP interface using the ip share-interface command. The command fails if the layer 2 interface does not yet exist. The command is not supported (that is, it fails) if you use an RSVP tunnel (for example, tunnel mpls:1) to identify the layer 2 interface.

After creating the shared IP interface, you can configure it as you do any other IP interface.

The shared interface is operationally up when the layer 2 interface is operationally up.

You can create operational shared IP interfaces in the absence of a primary IP interface.


  • All IP configurations will be removed from the interface when you issue the no ip interface command in Interface Configuration mode.
  • You cannot issue the ip share-nexthop command for the IP shared interface if the ip share-interface command is issued on the IP shared interface.

To specify the layer 2 interface to be used by a shared IP interface:

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