From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wilco Baan Hofman Subject: /128 link-local subnet on 6in4 (sit) tunnels? Date: Tue, 26 Mar 2013 23:04:17 +0100 Message-ID: <1364335457.8215.21.camel@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit To: netdev@vger.kernel.org Return-path: Received: from 37-251-2-65.FTTH.ispfabriek.nl ([37.251.2.65]:53116 "EHLO mail.baanhofman.nl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751986Ab3CZWL4 (ORCPT ); Tue, 26 Mar 2013 18:11:56 -0400 Received: from localhost (localhost [127.0.0.1]) by mail.baanhofman.nl (Postfix) with ESMTP id 71703788C3 for ; Tue, 26 Mar 2013 23:04:18 +0100 (CET) Received: from mail.baanhofman.nl ([127.0.0.1]) by localhost (blackhole.synnack.net [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id V1l4oXZmcwLK for ; Tue, 26 Mar 2013 23:04:06 +0100 (CET) Received: from [IPv6:2001:470:d1e7:1337:6cff:5d60:f81e:c34] (unknown [IPv6:2001:470:d1e7:1337:6cff:5d60:f81e:c34]) by mail.baanhofman.nl (Postfix) with ESMTPSA id B0133788BC for ; Tue, 26 Mar 2013 23:04:06 +0100 (CET) Sender: netdev-owner@vger.kernel.org List-ID: Hi, I was trying to get OSPFv3 working on NBMA 6in4 tunnel on linux 3.8, but it does not work. I noticed it uses a /128 fe80 link-local subnet instead of the rfc4213[1]-mandated /64.. This breaks bird (likely for other reasons), but also interoperability with cisco, which mandates OSPFv3 NBMA on link-local addresses. So I was wondering, is there any particular reason for the use of a /128 link-local or is this just a bug? Regards, Wilco Baan Hofman [1] http://tools.ietf.org/html/rfc4213