Re: More than one IP (sub)network on one ethernet cable

Alex McKenzie (mckenzie@LABS-N.BBN.COM)
Mon, 21 Dec 87 9:06:50 EST

A (temporary) reason we had at BBN for having two IP nets on a single Ethernet
was a restructuring of our campus network. We built one big Ethernet to
replace several smaller ones. It was extremely convenient to be able to
change which physical Ethernet a system was connected to asynchronously from
changing what IP address that host was using. In fact, if I recall correctly,
some hosts began using their new IP address before discontinuing use of their
old IP address, as another way of maintaining uninterrupted service during the

Alex McKenzie

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