On Mon, 02 Feb 2009 12:20:25 EST, "D'Arcy J.M. Cain" said: > On Mon, 02 Feb 2009 18:03:57 +0100 (CET) > sth...@nethelp.no wrote: > > > What reason could you possibly have to use non RFC 1918 space on a > > > closed network? It's very bad practice - unfortunately I do see it done > > > sometimes.... > > > > There are sometimes good reasons to do this, for instance to ensure > > uniqueness in the face of mergers and acquisitions. > > How does that help? If you are renumbering due to a merger, couldn't > you just agree on separate private space just as easily?
They don't renumber, they end up just double-NAT or triple-NAT betweem the merged units. I think one poor soul posted here that they had quintuple-NAT'ing going on due to a long string of mergers....
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