Re: IPv6, was IPv10 (fwd)

Brian E Carpenter <brian.e.carpenter@gmail.com> Thu, 29 December 2016 19:54 UTC

Return-Path: <brian.e.carpenter@gmail.com>
X-Original-To: ietf@ietfa.amsl.com
Delivered-To: ietf@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9E7F3129651 for <ietf@ietfa.amsl.com>; Thu, 29 Dec 2016 11:54:40 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2
X-Spam-Level:
X-Spam-Status: No, score=-2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id mFlHcWeVEhzM for <ietf@ietfa.amsl.com>; Thu, 29 Dec 2016 11:54:34 -0800 (PST)
Received: from mail-pg0-x22b.google.com (mail-pg0-x22b.google.com [IPv6:2607:f8b0:400e:c05::22b]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C1F07128AB0 for <ietf@ietf.org>; Thu, 29 Dec 2016 11:54:34 -0800 (PST)
Received: by mail-pg0-x22b.google.com with SMTP id y62so117509839pgy.1 for <ietf@ietf.org>; Thu, 29 Dec 2016 11:54:34 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:references:from:organization:message-id:date:user-agent :mime-version:in-reply-to:content-transfer-encoding; bh=AvHBRRf5q//q/GOVWcMjeyWMuIIqfUGZ91I9sCe70+E=; b=UWqvlfWSd7O5bBPvqI+Kj1HWEvBSig+1FpnGbm/rXpAaKHpLJiM8XhucJ7YHkDZonp y1qIrhlnPo4xhG+ECOOg1+QWITocZ4XdFBwxyHdNsGqV0vOjWCxWrHY/57iznCVmYsn0 9NhtXu48Zo75f7ZsmlMKWv0JmeXirX2Bn6wNN+FBUdzxhDIXO+ZzwXQLzLT78noIFqAb fMO0B38CI75qDK0J47OpFMx18+nHG5vRrvjJmmpvm3LMz2cDzsbKYlJ28vf53kYOO1kk ZOMvgx6o1mNB8GElntYUxwpz1akx1gxLkowysat0syiW/tCUl9z3JlYxL2JCgCjHR1Oy 4Mjg==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:organization :message-id:date:user-agent:mime-version:in-reply-to :content-transfer-encoding; bh=AvHBRRf5q//q/GOVWcMjeyWMuIIqfUGZ91I9sCe70+E=; b=dkqjyUKbLMWkgjrHTSimy3HB+4IAUhxIa1vMFGA+XrqKeJSZN0vh99vsrBH/1yrhZ0 L87+cUBeOZDQ8fOW41sGJfr3OeEukHdxzcijXudv0wdJNqZN2ca/2OfMK3G7YcFLCQ/3 WeAosCxMKTgUtQb5Jxb16se6I3mJlRhxQK5XfUnCFkRnm/9ej5Qnos+kYP0KAgh5H4B7 FUvs4iT/lX9Ie13w8IKxh4aDpOuJDdIxk4afCcVbwXVFW9lzUBJEnh+Ao8lbIvfl1QmR EJEVhNELgtbRZ7StJQiCW5TUGhFMYriBMqczt9SREUMk4Ot/lizrOEshuMXj0MOhmdsw xf6A==
X-Gm-Message-State: AIkVDXJWpiA0d9S7d8LH1TGTORd2UAJHZUhGrwNwPIHRDaTbpzfd/QMW3XVKFuRXAJB+Pg==
X-Received: by 10.84.217.5 with SMTP id o5mr90984798pli.85.1483041274337; Thu, 29 Dec 2016 11:54:34 -0800 (PST)
Received: from [192.168.178.27] (215.24.255.123.static.snap.net.nz. [123.255.24.215]) by smtp.gmail.com with ESMTPSA id q7sm46797104pgn.20.2016.12.29.11.54.32 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 29 Dec 2016 11:54:33 -0800 (PST)
Subject: Re: IPv6, was IPv10 (fwd)
To: John R Levine <johnl@taugh.com>, IETF general list <ietf@ietf.org>
References: <alpine.OSX.2.11.1612291429570.37525@ary.qy>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
Message-ID: <930f3af3-09af-e3c5-f796-507047ab54a1@gmail.com>
Date: Fri, 30 Dec 2016 08:54:40 +1300
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1
MIME-Version: 1.0
In-Reply-To: <alpine.OSX.2.11.1612291429570.37525@ary.qy>
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
Archived-At: <https://mailarchive.ietf.org/arch/msg/ietf/lIceYB2tm6sVHq722HxviFskQU4>
X-BeenThere: ietf@ietf.org
X-Mailman-Version: 2.1.17
Precedence: list
List-Id: IETF-Discussion <ietf.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ietf>, <mailto:ietf-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ietf/>
List-Post: <mailto:ietf@ietf.org>
List-Help: <mailto:ietf-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ietf>, <mailto:ietf-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 29 Dec 2016 19:54:40 -0000

On 30/12/2016 08:30, John R Levine wrote:
>>> I might be able to use ULAs but I have no idea how well ULAs actually work
>>
>> Exactly like any other global-scope IPv6 address. They just work. (I speak
>> from experience.)
> 
> How do I tell my router that the ULAs on the home side of the router are 
> different from ULAs on the cableco side?

Your ULAs are all in your ULA /48 prefix. I'm not clear why the cableco would
be using ULAs, but if they do, those address will be in the cableco's ULA /48.
No confusion is possible, and as a border router, it SHOULD drop outbound
packets with source addresses in your ULA /48.

>> If you want static addresses on your servers, it's no different from any 
>> other static address. But maybe I am not understanding your concern.
> 
> If I knew I had an address range that held still, I would use DHCPv6 and see 
> how many of my devices handle it.  What happens if I have ULA addresses handed 
> out by DHCPv6 and global addresses from SLAAC?  Do I have to turn off SLAAC?

In the router advertisements, the prefix information option for the ULA prefix
would need its A flag turned off.

> (If this stuff is all written down somewhere, I would be thrilled to get 
> the reference.)

This is more for v6ops or even ipv6-ops@lists.cluenet.de. To be honest I
don't know if any of the IPv6 books covers this stuff in detail.

    Brian