Date: Thu, 16 Nov 1995 11:49:56 +0100 (MET) From: Piero Serini <piero@strider.ibenet.it> To: team_fbf@pristine.com.tw (ywliu) Cc: wollman@lcs.mit.edu, me@gw.muc.ditec.de, questions@FreeBSD.org Subject: Re: How do I setup IP aliases? Message-ID: <199511161049.LAA15220@strider.ibenet.it> In-Reply-To: <199511161147.LAA28103@neptune.pristine.com.tw> from "ywliu" at Nov 16, 95 11:47:27 am
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Hello. Quoting from ywliu (Thu Nov 16 12:47:27 1995): > > > ifconfig de0 134.98.17.10 netmask 0xffffff00 > > > ifconfig de0 alias 134.98.18.10 netmask 0xffffffff > > > ifconfig de0 alias 134.98.19.10 netmask 0xffffffff > > > > > Should I expect problems, or am I understanding something wrong? > > > > Yes. You should expect to be unable to contact any other host on the > > 134.98.18 and 134.98.19 subnets. > > Could you elaborate on this more ? Why don't those two aliases work ? Because unless you run a routing protocol which understands vari- able subnetting, you just told your interface that you have a network 134.98.19.10 with a single address (134.98.19.10) and the network and broadcast addresses identical (both: 134.98.19.10). In other words, any address on the network 134.98.19.0 is seen as non-local, and your machine isn't able to contact them. The same for the other network 134.98.18.10. Please Garrett cor- rect me where I'm wrong (I'm sure you will). Bye, -- # $Id: .signature,v 1.12 1995/08/14 12:10:54 piero Exp $ Piero Serini Via Giambologna, 1 <Piero@Free.IT> I 20136 Milano - ITALY
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