IETF Logo Mail Archive

Re: [v6ops] Scope of Unique Local IPv6 Unicast Addresses (Fwd: New Version Notification for draft-gont-6man-ipv6-ula-scope-00.txt)

Ted Lemon <mellon@fugue.com> Sat, 13 February 2021 20:47 UTC

Return-Path: <mellon@fugue.com>
X-Original-To: v6ops@ietfa.amsl.com
Delivered-To: v6ops@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 11DEF3A0CD5 for <v6ops@ietfa.amsl.com>; Sat, 13 Feb 2021 12:47:11 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.898
X-Spam-Level:
X-Spam-Status: No, score=-1.898 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=fugue-com.20150623.gappssmtp.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 wE-Y8dxuTQCL for <v6ops@ietfa.amsl.com>; Sat, 13 Feb 2021 12:47:09 -0800 (PST)
Received: from mail-qt1-x832.google.com (mail-qt1-x832.google.com [IPv6:2607:f8b0:4864:20::832]) (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 A9F0B3A0CD4 for <v6ops@ietf.org>; Sat, 13 Feb 2021 12:47:09 -0800 (PST)
Received: by mail-qt1-x832.google.com with SMTP id b24so2265179qtp.13 for <v6ops@ietf.org>; Sat, 13 Feb 2021 12:47:09 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fugue-com.20150623.gappssmtp.com; s=20150623; h=from:message-id:mime-version:subject:date:in-reply-to:cc:to :references; bh=pm07WLwzEokGZgYSYO5uZyJlAm2caj79zFUwHDmYwpw=; b=e34VRziZCvCr0Y1Ud3dzoq6Fx17rnjSvLnLH4BmllyvzHiXyN3Rkj1tAVsdwXYkXZC p90OHqo2xz7ilmOWIEtJc0QPhp3urJVAWtRPGFnjQZf8HUhY9KdzB5k3/Xo/eMb5O0D3 a8aJhXfolVPzxQxeuMAmeQuR4NY3kQBGrDLWpIRmOWoPiD+PssTJRM5uQCOESCQHkFV8 otxuwKW11RV5jUd6QJT6Pwvap4gw5Np2VEZk6DjegGD4LsHm1JV6ySBEuw9CFa2KpTBh IgRyaR+gk1aLFdq4E5xQC6n28e7zDvYcXRzX6vMcQbS33NqXbI5VTubsYTOKFUkanLkG 5Zpw==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:message-id:mime-version:subject:date :in-reply-to:cc:to:references; bh=pm07WLwzEokGZgYSYO5uZyJlAm2caj79zFUwHDmYwpw=; b=ubDVEf0i+Idr1HaMXaPWERBipiVJ2DFM1kUu4ZLj34EJHJ0jAoqnN97061mdjp7hRl kB/iWwKYWxOROWCaR7Et0J7apDzt/dT9j/9zcfgC9jYvRmphFH/dw8sTbmGNBWhMM8Zp WY0E1eCHG7kWHG48qgDrCSHmrFfbOU/Gmp+sMbV09QMkxE7AAQM56frpwFn4aOlHFQkI d2mgR4B/LMhU+7AIFSOd8j6qfZMuaqsQC7D/Gyq7Tqh+GGubl38O+B2KkO5Lo05eYp79 gjkYjvFiaJtkDgewfNyhmLvpdARIKavysKrp7h0PYaJwEE8Iatm1SmnLjPYfhFHemw3K mmww==
X-Gm-Message-State: AOAM532dQ5dR9a9MdrAZe3PjtXbdzfhzP1RhiOZV+8RTQCg+itYGIYgh PWXgm5dtejGXcy+JQAL1gjVPjA==
X-Google-Smtp-Source: ABdhPJyrMzXYJt5B7bBnrwhetCRxp9TpsUXAWJU+PMrmuwNKRqjSOy/2Q4wTBMp+ChwoeEBFTeWzww==
X-Received: by 2002:ac8:7cb8:: with SMTP id z24mr8229295qtv.31.1613249228866; Sat, 13 Feb 2021 12:47:08 -0800 (PST)
Received: from smtpclient.apple (c-24-91-177-160.hsd1.ma.comcast.net. [24.91.177.160]) by smtp.gmail.com with ESMTPSA id j66sm8827165qkf.78.2021.02.13.12.47.08 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sat, 13 Feb 2021 12:47:08 -0800 (PST)
From: Ted Lemon <mellon@fugue.com>
Message-Id: <068026B8-CC9B-46DA-ACB1-5F0FBC90D187@fugue.com>
Content-Type: multipart/alternative; boundary="Apple-Mail=_8717E910-1A4F-4359-B5FF-619B3F3096C1"
Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.80.0.2.32\))
Date: Sat, 13 Feb 2021 15:47:07 -0500
In-Reply-To: <e9479846-7c0e-df4e-67a6-0d2db4cdeec1@si6networks.com>
Cc: Brian E Carpenter <brian.e.carpenter@gmail.com>, Fred Baker <fredbaker.ietf@gmail.com>, IPv6 Operations <v6ops@ietf.org>, "6man@ietf.org" <6man@ietf.org>
To: Fernando Gont <fgont@si6networks.com>
References: <160989494094.6024.7402128068704112703@ietfa.amsl.com> <6fe3a45e-de65-9f88-808d-ea7e2abdcd16@si6networks.com> <F4E00812-E366-4520-AE17-7BB46E28D575@gmail.com> <b2e51a89-e8a7-9ddb-643d-63a98569b03c@si6networks.com> <CB9EA5F4-A241-46A4-A371-B2A1BFB8C72F@fugue.com> <dff93a2e-f4f8-01c9-ce88-c2dbb20a04f1@si6networks.com> <759637FF-77C7-41EA-8671-73988AD48873@fugue.com> <9877D352-E9BB-453B-A676-D2B5C546C1C2@gmail.com> <11035C3E-BA75-4B9D-A047-B2AA1DE23BEA@fugue.com> <b3f1c53f-c22d-c9fb-6094-9a15d79fcd43@si6networks.com> <b9972eb4-b4db-e82d-12ec-1cfcc75a9e45@gmail.com> <6345cc51-48e4-abba-58b8-001b70efb325@si6networks.com> <9768b3fe-9d2d-fe5c-0a6c-3c56dacef0da@gmail.com> <e9479846-7c0e-df4e-67a6-0d2db4cdeec1@si6networks.com>
X-Mailer: Apple Mail (2.3654.80.0.2.32)
Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/nuAZ34LvLQ5INs-tIfceV-PatkE>
Subject: Re: [v6ops] Scope of Unique Local IPv6 Unicast Addresses (Fwd: New Version Notification for draft-gont-6man-ipv6-ula-scope-00.txt)
X-BeenThere: v6ops@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: v6ops discussion list <v6ops.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/v6ops>, <mailto:v6ops-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/v6ops/>
List-Post: <mailto:v6ops@ietf.org>
List-Help: <mailto:v6ops-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/v6ops>, <mailto:v6ops-request@ietf.org?subject=subscribe>
X-List-Received-Date: Sat, 13 Feb 2021 20:47:11 -0000

On Feb 13, 2021, at 3:18 PM, Fernando Gont <fgont@si6networks.com> wrote:
> BUt that's again ULAs being special. And they usually have properties of "private" addresses -- e.g., can generally be expected to be valid if your link to your ISP goes down, are more unlikely of being renumbered, etc.

If your link is numbered with ULAs, then you’ll choose a ULA whenever you’re communicating with another ULA, because of the longest match rule.

Source address selection is below the level of naming, so you’ve already picked your destination address by the time you start doing it.

v2.23.0 | Report a Bug | By Email