From owner-freebsd-questions Mon Apr 29 23:41:29 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id XAA12256 for questions-outgoing; Mon, 29 Apr 1996 23:41:29 -0700 (PDT) Received: from mailhub.aros.net (mailhub.aros.net [205.164.111.17]) by freefall.freebsd.org (8.7.3/8.7.3) with ESMTP id XAA12251 for ; Mon, 29 Apr 1996 23:41:27 -0700 (PDT) Received: from terra.aros.net (terra.aros.net [205.164.111.10]) by mailhub.aros.net (8.7.5/Unknown) with ESMTP id AAA12804 for ; Tue, 30 Apr 1996 00:56:26 -0600 (MDT) Received: (from angio@localhost) by terra.aros.net (8.7.5/8.6.12) id AAA26399 for freebsd-questions@freebsd.org; Tue, 30 Apr 1996 00:41:23 -0600 From: Dave Andersen Message-Id: <199604300641.AAA26399@terra.aros.net> Subject: Re: Porting if_vif.c to FreeBSD 2.0.5... To: freebsd-questions@freebsd.org Date: Tue, 30 Apr 1996 00:41:22 -0600 (MDT) In-Reply-To: <199604300206.LAA18141@genesis.atrad.adelaide.edu.au> from "Michael Smith" at Apr 30, 96 11:36:53 am X-Mailer: ELM [version 2.4 PL25 PGP2] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Lo and behold, Michael Smith once said: > > rjb@intac.com stands accused of saying: > > > > Has anyone had any experience porting John Ionnidis's vif (virtural interface) > > code to FreeBSD? > > Why bother? FreeBSD allows you to alias an arbitrary number of addresses > to an interface, so dummy interfaces are completely unnecessary. On the stupid question front, I'm wondering if anyone's actually looked at the kind of degredation you get with packet response times on aliased interfaces? To wit: On a linux 1.2.13 with aliasing, the 130th alias takes ~3ms longer to ping on a local ethernet than the interface address itself. (4.5ms vs 1.5ms). I don't have enough aliases on the freebsd boxes to test this (and they're 'production' so I'm not in the mood to play with them. :), so I'm curious if someone's actually looked at it? -Dave Andersen -- angio@aros.net Complete virtual hosting and business-oriented system administration Internet services. (WWW, FTP, email) http://www.aros.net/ http://www.aros.net/about/virtual "There are only two industries that refer to thier customers as 'users'."