From owner-freebsd-hackers Wed Dec 17 16:14:42 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id QAA29325 for hackers-outgoing; Wed, 17 Dec 1997 16:14:42 -0800 (PST) (envelope-from owner-freebsd-hackers) Received: from etinc.com (et-gw-fr1.etinc.com [204.141.244.98]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id QAA29315 for ; Wed, 17 Dec 1997 16:14:25 -0800 (PST) (envelope-from dennis@etinc.com) Received: from dbsys.etinc.com (dbsys.etinc.com [204.141.95.138]) by etinc.com (8.8.3/8.6.9) with SMTP id TAA16836; Wed, 17 Dec 1997 19:18:24 -0500 (EST) Message-Id: <3.0.32.19971217191713.00d44320@etinc.com> X-Sender: dennis@etinc.com X-Mailer: Windows Eudora Pro Version 3.0 (32) Date: Wed, 17 Dec 1997 19:17:13 -0500 To: Karl Denninger From: dennis Subject: Re: ifconfig reports bogus netmask Cc: hackers@freebsd.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Sender: owner-freebsd-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk At 09:41 AM 12/17/97 -0600, you wrote: >On Wed, Dec 17, 1997 at 10:08:26AM -0500, dennis wrote: >> At 11:34 AM 12/17/97 +1030, Greg Lehey wrote: >> Your ISP, unfortunately, most likely uses Ciscos, which CANNOT route to >> hosts. Ciscos can only route to nets, so you must set the PTP interface >> to a subnet mask. This is a waste of a net and arguably wrong (since there >> is, in fact, no network), but we live in a world of ciscoheads. With unix >> you only need use 2 addresses per PTP interface..with ciscos you need to >> use an entire subnet. >> >> Dennis > >Balderdash. > >CISCOs can run un-numbered interfaces (the proper way to do a PTP link where >the terminal end is not a network) and further, can in fact handle and >advertise host routes. Ha, ha. "Unnumbered Interfaces" are a kludge created by Cisco to correct the fact that their interfaces must be on a net. Unnumbered interfaces break the rules of routing. Dennis