From owner-freebsd-questions Mon Dec 14 15:52:52 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id PAA02969 for freebsd-questions-outgoing; Mon, 14 Dec 1998 15:52:52 -0800 (PST) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from java.dpcsys.com (java.dpcsys.com [206.16.184.7]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id PAA02964 for ; Mon, 14 Dec 1998 15:52:50 -0800 (PST) (envelope-from dan@dpcsys.com) Received: from localhost (dan@localhost) by java.dpcsys.com (8.9.1a/8.9.1) with SMTP id PAA17495; Mon, 14 Dec 1998 15:52:34 -0800 (PST) Date: Mon, 14 Dec 1998 15:52:34 -0800 (PST) From: Dan Busarow To: Lew Payne cc: Dan , freebsd-questions@FreeBSD.ORG Subject: Re: Strange Network Problem In-Reply-To: <199812142315.PAA22711@mail.lppi.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Mon, 14 Dec 1998, Lew Payne wrote: > > 2) What is the proper netmask for aliased IPs? I have found reasonably > > authoritative references to both 255.255.255.255 and 255.255.255.254 in > > the archives. I would like to clear this up. > > Huh? The proper netmask to use is the netmask which accurately > represents the address block you've been assigned. You must ASK > what the actual address block is that those other IP's came from, > and set your netmask accordingly. Setting an arbitrary netmask > is an invitation to disaster. The broadcast address, computed > >from your netmask, MAY BE ALREADY ASSIGNED TO ANOTHER MACHINE. A more accurate answer would be, make sure that your non-aliased IP address is assigned the correct netmask. Use 255.255.255.255 for all aliased IP's that are within the subnet defined by the real netmask. And using the wrong netmask for the non-aliased IP is probably what is causing the original problem. Dan -- Dan Busarow 949 443 4172 Dana Point Communications, Inc. dan@dpcsys.com Dana Point, California 83 09 EF 59 E0 11 89 B4 8D 09 DB FD E1 DD 0C 82 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message