Date: Wed, 28 Feb 2001 02:56:57 +0100 (CET) From: Luigi Rizzo <luigi@info.iet.unipi.it> To: Josef Karthauser <joe@tao.org.uk> Cc: "Rogier R. Mulhuijzen" <drwilco@drwilco.nl>, Matthew Emmerton <matt@gsicomp.on.ca>, Jonathan Graehl <jonathan@graehl.org>, freebsd-net@FreeBSD.ORG Subject: Re: Quick question about IP aliasing Message-ID: <200102280156.CAA29214@info.iet.unipi.it> In-Reply-To: <20010227194556.C737@tao.org.uk> from Josef Karthauser at "Feb 27, 2001 07:45:56 pm"
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> On Tue, Feb 27, 2001 at 07:16:14AM +0100, Rogier R. Mulhuijzen wrote: > > > > >The point is that you need to use a netmask of 255.255.255.255 for aliased > > >IPs on FreeBSD, regardless of the alias of the primary (non-alias) IP. no this is incorrect. you just have to make sure that the aliased IP&mask do not generate info which is already in the routing table. E.g. if your primary addr is 1.2.3.4/24 , an alias of 1.2.3.5/24 will give a warning, but an alias of 1.2.4.4/24 will not, and most likely even 1.2.3.5/25 will not. > > > > Everybody is saying use 255.255.255.255 for an alias. Noone is giving > > reasons why. > > I don't understand this either. To my mind it's a bug if it doesn't > work with the full netmask for an IP alias address. it does work, you just have tomake sure that you use the correct parameters. cheers luigi To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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