Date: Wed, 17 Dec 1997 21:02:29 +0100 From: sthaug@nethelp.no To: abial@korin.warman.org.pl Cc: hackers@FreeBSD.ORG Subject: Re: ifconfig reports bogus netmask Message-ID: <24945.882388949@verdi.nethelp.no> In-Reply-To: Your message of "Wed, 17 Dec 1997 19:44:08 %2B0100 (CET)" References: <Pine.NEB.3.95.971217194100.130B-100000@korin.warman.org.pl>
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> And even if you don't want to run unnumbered interface, you waste only 4 > addresses (x.x.x.x/255.255.255.252), and even these can be private (e.g. > 10.x.x.x)... So I don't see that much waste here. Wasting 4 addresses (instead of 2) for point to point links is not a big deal, and we do it all the time. Using RFC 1918 addresses for point to point links on the Internet is not a good idea, because: - You'll get ICMP messages with RFC 1918 addresses as source (think of traceroute). - Many organizations filter RFC 1918 source addresses at their border routers. Thus the corresponding ICMPs will never arrive. Steinar Haug, Nethelp consulting, sthaug@nethelp.no
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