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    Forcing an IP Interface to Appear Up

    You can force an IP interface to appear as if it is up using the ip alwaysup command, regardless of the state of the lower layers.

    This command reduces route topology changes when the network attached to this link is single-homed.

    Note:

    • Before you configure IP, you must create the lower-layer interfaces over which IP traffic flows.
    • All IP configurations will be removed from the interface when you issue the no ip interface command in Interface Configuration mode.

    To force an IP interface to appear as up regardless of the state of lower layers:

    • Issue the ip alwaysup command in Interface Configuration mode.
      host1(config-if)#ip alwaysup

      Use the no version to make the interface appear in the current state.

    Published: 2014-08-13