Date: Wed, 28 Feb 2001 06:47:49 +0100 (CET) From: Luigi Rizzo <luigi@info.iet.unipi.it> To: Alex Rousskov <rousskov@measurement-factory.com> Cc: freebsd-net@FreeBSD.ORG Subject: Re: Quick question about IP aliasing Message-ID: <200102280547.GAA30434@info.iet.unipi.it> In-Reply-To: <Pine.BSF.4.10.10102272155120.42355-100000@measurement-factory.com> from Alex Rousskov at "Feb 27, 2001 10:06:58 pm"
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Alex, > Can you be more specific please? Is it just a harmless warning > message or a true error? In other words, will anything break if I use > a.b.c.2/24 alias on the interface with the a.b.c.1/24 primary address? technically i think it is a real error to use a /24 alias, but i am not 100% sure about the amt of problems it causes. > Unfortunately, I cannot simply ignore the discussion. For benchmarking > purposes, we routinely use thousands of IP aliases that belong to the > same subnet on one interface without any known problems. I want to > know if we are doing something wrong. > > I do not care about the ifconfig warning by itself. We do not > even use ifconfig to manage aliases. I care about the actual run-time > code that handles the addresses. Could you please clarify whether if you do care about this, you may want to restructure the data structure used to store/match interface addresses. At the moment it is a linear list, so the matching of incoming packets is probably Very Time Comsuming! cheers luigi ----------------------------------+----------------------------------------- Luigi RIZZO, luigi@iet.unipi.it . ACIRI/ICSI (on leave from Univ. di Pisa) http://www.iet.unipi.it/~luigi/ . 1947 Center St, Berkeley CA 94704 Phone (510) 666 2927 . ----------------------------------+----------------------------------------- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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