From owner-freebsd-questions Fri Nov 6 18:39:45 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id SAA11995 for freebsd-questions-outgoing; Fri, 6 Nov 1998 18:39:45 -0800 (PST) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from sand2.sentex.ca (sand2.sentex.ca [209.167.248.3]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id SAA11990 for ; Fri, 6 Nov 1998 18:39:42 -0800 (PST) (envelope-from mike@sentex.net) Received: from gravel (ospf-wat.sentex.net [209.167.248.81]) by sand2.sentex.ca (8.8.8/8.8.8) with SMTP id VAA29915; Fri, 6 Nov 1998 21:42:32 -0500 (EST) (envelope-from mike@sentex.net) Message-Id: <3.0.5.32.19981106214459.010f38e0@sentex.net> X-Sender: mdtancsa@sentex.net X-Mailer: QUALCOMM Windows Eudora Pro Version 3.0.5 (32) Date: Fri, 06 Nov 1998 21:44:59 -0500 To: Dan Busarow From: Mike Tancsa Subject: Re: Alias lo0 or real interface Cc: questions@FreeBSD.ORG In-Reply-To: References: <3.0.5.32.19981106212103.00c287f0@sentex.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG At 06:25 PM 11/6/98 -0800, Dan Busarow wrote: >On Fri, 6 Nov 1998, Mike Tancsa wrote: >> One thing I am not clear on, when aliasing virtual interfaces for web >> hosting purposes, should one choose lo0 or a real interface like fxp0 ? I >> searched through the archives and lots of people mention or give examples >> of aliasing the loopback interface, but I havent seen any explantions as to >> why. Are there any pointers explaining this ? > >If you alias loopback then you need to manually add arp entries too, >if you alias the real interface the arp entries are automatically added >for you. > >Not sure what advantage there is in using lo0 Thanks for responding... I guess these are the sorts of questions I am trying to find answers to... I am not quite sure the implications of this in a ethernet switched environment. If there are no arp entries, does this not help along the switch ? i.e. less MAC addresses to keep in memory the better, or does it matter with only 400 or so aliases on a few machines ? ---Mike ********************************************************************** Mike Tancsa, Network Admin * mike@sentex.net Sentex Communications Corp, * http://www.sentex.net/mike Cambridge, Ontario * 01.519.651.3400 Canada * To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message