From owner-freebsd-net@FreeBSD.ORG Sat Jul 28 16:34:01 2007 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 5C1F216A419 for ; Sat, 28 Jul 2007 16:34:01 +0000 (UTC) (envelope-from netslists@gmail.com) Received: from wx-out-0506.google.com (wx-out-0506.google.com [66.249.82.227]) by mx1.freebsd.org (Postfix) with ESMTP id 2152713C461 for ; Sat, 28 Jul 2007 16:34:01 +0000 (UTC) (envelope-from netslists@gmail.com) Received: by wx-out-0506.google.com with SMTP id i29so887663wxd for ; Sat, 28 Jul 2007 09:34:00 -0700 (PDT) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:user-agent:mime-version:to:cc:subject:references:in-reply-to:content-type:content-transfer-encoding; b=fOt2i95jOHeb3GBtfIh3JyeTtN7guoM3HK4VpBFFIKVVb8ZOuEPjpwVQonIcqECvusjlsqHKCMWXrSRcEti/r9blqkeh07hlsut4hhk2OUJDDBHOIN7tWFtYusxPNIK/3kQEGeNmCHFdM/iLDgijOu0GtwWT4SRtEojJQEk/j90= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:user-agent:mime-version:to:cc:subject:references:in-reply-to:content-type:content-transfer-encoding; b=puIGQMcFYrRqetyUPyDMUj9c6ulGVBlF6E1rKDoh0C8XRKUkdGV3OSuyFzuX2QasaBdqO6Mcl3eTyWQ4c/OOWXVqAwinUaOkQKZyNzB0RBCJQPWjRcY1c3XkoNiYoMHaA0365uv8UWSixvvmIdx8YguDKEBV+z+6xK4UzeoyR2c= Received: by 10.70.33.8 with SMTP id g8mr7096251wxg.1185640439968; Sat, 28 Jul 2007 09:33:59 -0700 (PDT) Received: from ?192.168.12.8? ( [72.189.172.75]) by mx.google.com with ESMTPS id o29sm1250571elf.2007.07.28.09.33.59 (version=SSLv3 cipher=RC4-MD5); Sat, 28 Jul 2007 09:33:59 -0700 (PDT) Message-ID: <46AB6FF1.6030007@gmail.com> Date: Sat, 28 Jul 2007 12:33:53 -0400 From: Sten Daniel Soersdal User-Agent: Thunderbird 2.0.0.5 (Windows/20070716) MIME-Version: 1.0 To: Lee Johnston References: <46AA1082.6010503@wildcard.net.uk> In-Reply-To: <46AA1082.6010503@wildcard.net.uk> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-net@freebsd.org Subject: Re: 31-Bit IPv4 Prefixes X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 28 Jul 2007 16:34:01 -0000 Lee Johnston wrote: > Hi all, > > We've just been allocated a /31 for a point-to-point over ethernet. Any > idea if FreeBSD supports 31-bit prefixes as per RFC 3021? All I'm > getting are: > > arp: 00:02:4a:9c:b8:81 attempts to modify permanent entry for > xx.xx.xx.xx on em2.3211 > It is likely that the /31 is not routed through your pppoe tunnel but instead assigned to your pppoe tunnel. Probably they expect you to use those two addresses in combination with NAT. Routed operation is usually only possible (without trickery) on /30 or larger. But perhaps your /31 falls neatly within a /30 and they did not route the network/broadcast address? Why not just ask your provider how you were thought to use these addresses? You are the customer, you cannot be expected to be the routing wiz on *their* network. I always ask anyway, the explanations are sometimes colorful but often i hear "oh, wait a minute, this doesn't make sense! hang on...". -- Sten Daniel Soersdal