From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-iw0-f171.google.com (mail-iw0-f171.google.com [209.85.214.171]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id C2021201A75 for ; Tue, 10 May 2011 20:25:49 -0700 (PDT) Received: by iwn8 with SMTP id 8so193987iwn.16 for ; Tue, 10 May 2011 20:32:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=rmtNZ5sUVI7ibekcZci9teLk5wJrBhSNb1s+In2qKRU=; b=i1IhLCVR7XXe3HKDJFy6PVM35jHe6qgpnoOUdE5VcVebP86Q3ilYOy2JWBGpGwD83T UC/QsnIUizXZVajAARJ2QiSbGO7e1XixAMVNqA6k6SgOzeUAGOpdssBxF/TfcU+Gs6E7 cT6BK5+FiLAPMkTgbu8BJmxQyyhlXYlUOAx8M= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=igpKPAVm5w03gCpn29eGT7OUfw5QNN733w+R/XdkXLJfIr4XoVhflm4ydfUa2myK7h 0eQKlJ5ELooSYHT/Nc2pnZxfVohdoHo+ECN9kUQjA4PaEiamBtxUIPhCzo64QrhkWCl5 pzp3LN/xSNskKwS5kZq163LJMmJxVKsQBV1Uc= MIME-Version: 1.0 Received: by 10.42.163.10 with SMTP id a10mr6513432icy.493.1305084775219; Tue, 10 May 2011 20:32:55 -0700 (PDT) Received: by 10.231.31.201 with HTTP; Tue, 10 May 2011 20:32:55 -0700 (PDT) In-Reply-To: <4DC94BF6.5060302@visser.name> References: <4DC94BF6.5060302@visser.name> Date: Tue, 10 May 2011 21:32:55 -0600 Message-ID: From: Dave Taht To: Jeremy Visser Content-Type: multipart/alternative; boundary=90e6ba6139ee6dc0da04a2f7ba79 Cc: bloat@lists.bufferbloat.net Subject: Re: [Bloat] ipv6 fe80:: addresses, vlans and bridges... borked? X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 May 2011 03:25:50 -0000 --90e6ba6139ee6dc0da04a2f7ba79 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable On Tue, May 10, 2011 at 8:30 AM, Jeremy Visser wrote: > Dave Taht said: > > the bridged to a vlan fe80:: addresses are all the same. This strikes m= e > > as a problem. > > You never reference link-local address by themselves anyway =97 they are > always referenced with their scope ID for context. So your addresses are > unique after all: > > fe80::c63d:c7ff:fe8b:6e1a%br-lan > fe80::c63d:c7ff:fe8b:6e1a%br-guest > fe80::c63d:c7ff:fe8b:6e1a%br-meshlink1 > fe80::c63d:c7ff:fe8b:6e1a%br-meshlink2 > 1) in a wireshark analysis, the %interface part is lost 2) we have 2^64 possible choices for fe80 addresses. I don't see what havin= g them all be the same buys me. 3) It worries me in the babel routing protocol 4) My bridges are misbehaving over ipv6 in the general case and I'm willing to grasp at straws. > Forgive me if I am stating the obvious or misunderstanding your point. > _______________________________________________ > Bloat mailing list > Bloat@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/bloat > --=20 Dave T=E4ht SKYPE: davetaht US Tel: 1-239-829-5608 http://the-edge.blogspot.com --90e6ba6139ee6dc0da04a2f7ba79 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable

On Tue, May 10, 2011 at 8:30 AM, Jeremy = Visser <jeremy@v= isser.name> wrote:
Dave Taht said:
> the bridged to a vlan fe80:: addresses are all the same. This strikes = me
> as a problem.

You never reference link-local address by themselves anyway =97 they = are
always referenced with their scope ID for context. So your addresses are unique after all:

fe80::c63d:c7ff:fe8b:6e1a%br-lan
fe80::c63d:c7ff:fe8b:6e1a%br-guest
fe80::c63d:c7ff:fe8b:6e1a%br-meshlink1
fe80::c63d:c7ff:fe8b:6e1a%br-meshlink2

1) in a wir= eshark analysis, the %interface part is lost
2) we have 2^64 possible ch= oices for fe80 addresses. I don't see what having them all be the same = buys me.
3) It worries me in the babel routing protocol
4) My bridges are misbeha= ving over ipv6 in the general case and I'm willing to grasp at straws. =


Forgive me if I am stating the obvious or misunderstanding your point.
_______________________________________________
Bloat mailing list
Bloat@lists.bufferbloat.net<= /a>
= https://lists.bufferbloat.net/listinfo/bloat



--
Dave T=E4ht
SKYPE: d= avetaht
US Tel: 1-239-829-5608
http://the-edge.blogspot.com
--90e6ba6139ee6dc0da04a2f7ba79--