Date: Tue, 08 Oct 1996 01:14:17 -0400 From: fbsd-isp@launchpad.win.net (Joe Mays - freebsd-isp) To: freebsd-isp@freebsd.org Subject: Subnetting Message-ID: <AB3@launchpad.win.net>
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I have a question about subnetting. Why is it a no-no to use all zero (or all 1 for that matter) subnet numbers? Everything says, "Don't do it," but nothing says why, beyond the fact that it's non-standard. In the end everything points at RFC 950, which just says, "It's not recommended," again without giving a reason. Okay, so I accept that it's non-standard, but it should work. Even Cisco's documentation admits that it works, while saying, "We don't advise it." My question is... Is there some specific *technical* reason for not doing it? Is it bad for any performance reason? Is there anything that will malfunction because of it? I mean, abiding by this standard sacrifices a lot of IP numbers. I'd like to know why I'm doing it beyond "being a good little netter." Joe Mays
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