From owner-freebsd-stable Fri Sep 28 13: 8:27 2001 Delivered-To: freebsd-stable@freebsd.org Received: from lists.blarg.net (lists.blarg.net [206.124.128.17]) by hub.freebsd.org (Postfix) with ESMTP id 81E6D37B409 for ; Fri, 28 Sep 2001 13:08:24 -0700 (PDT) Received: from thig.blarg.net (thig.blarg.net [206.124.128.18]) by lists.blarg.net (Postfix) with ESMTP id 29BF2BD2A; Fri, 28 Sep 2001 13:08:24 -0700 (PDT) Received: from localhost.localdomain ([206.124.139.115]) by thig.blarg.net (8.9.3/8.9.3) with ESMTP id NAA25915; Fri, 28 Sep 2001 13:08:23 -0700 Received: (from jojo@localhost) by localhost.localdomain (8.11.6/8.11.3) id f8SKCVZ00529; Fri, 28 Sep 2001 13:12:31 -0700 (PDT) (envelope-from swear@blarg.net) To: "Kevin Oberman" Cc: freebsd-stable@FreeBSD.ORG Subject: Re: 127/8 continued References: <200109280013.f8S0DJk04764@ptavv.es.net> From: swear@blarg.net (Gary W. Swearingen) Date: 28 Sep 2001 13:12:31 -0700 In-Reply-To: <200109280013.f8S0DJk04764@ptavv.es.net> Message-ID: <8bpu8bjcr4.u8b@localhost.localdomain> Lines: 23 User-Agent: Gnus/5.0808 (Gnus v5.8.8) XEmacs/21.1 (Cuyahoga Valley) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG "Kevin Oberman" writes: > RFC 3021 describes a better way of addressing directly connected links > so half the space is not wasted. a /31 is used for each connection > allowing for 4 point to point connections from a /29. > > Whether FreeBSD routers can be configured to do this, I can't say, but > I suspect manual route commands would do the job. I know Juniper > routers support this capability. Based on my many experiments (but sketchy knowledge), I find that the "route" command does the job, but the "ifconfig" command has problems with it. I can't get routing to work if I configure the interface with /31 (or /32 or point-to-point, if that's relevant). I have to use /29 (maybe /30 works too - I've forgotten), and then, of course, ifconfig creates /29 routes at creation and again at "up" time. That's interesting about the RFC. I had read that true subnet network address could be used for hosts IPs but I had not heard that for the broadcast address too. I wonder what fraction of SAs could say when or why it's OK to do so. Thanks for the tip. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message