Ryan Carretta Tue, 06/03/2008 - 02:09
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Setting up a loopback won't interrupt service unless you are totally careless somehow. Many consider it to be a good practice because it is an address that will always be up so long as the switch is up, so there can be many ways to reach it, any several of which can fail without losing connectivity. Also, it is helpful when using some routing protocols (f.ex. OSPF) in that the router ID will be predictable.

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