IETF Logo Mail Archive

Re: IPv6 certification - IPv6 Router Advertisement Lifetime 0 and Reachable time 10 seconds

Alexandre Petrescu <alexandre.petrescu@gmail.com> Mon, 25 January 2021 14:44 UTC

Return-Path: <alexandre.petrescu@gmail.com>
X-Original-To: ipv6@ietfa.amsl.com
Delivered-To: ipv6@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E511B3A1377 for <ipv6@ietfa.amsl.com>; Mon, 25 Jan 2021 06:44:34 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: 3.154
X-Spam-Level: ***
X-Spam-Status: No, score=3.154 tagged_above=-999 required=5 tests=[DKIM_ADSP_CUSTOM_MED=0.001, FORGED_GMAIL_RCVD=1, FREEMAIL_FROM=0.001, NICE_REPLY_A=-0.001, NML_ADSP_CUSTOM_MED=1.2, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_SOFTFAIL=0.972] autolearn=no autolearn_force=no
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 JZaUFUfcTyhJ for <ipv6@ietfa.amsl.com>; Mon, 25 Jan 2021 06:44:33 -0800 (PST)
Received: from cirse-smtp-out.extra.cea.fr (cirse-smtp-out.extra.cea.fr [132.167.192.148]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 9513E3A1376 for <ipv6@ietf.org>; Mon, 25 Jan 2021 06:44:33 -0800 (PST)
Received: from pisaure.intra.cea.fr (pisaure.intra.cea.fr [132.166.88.21]) by cirse-sys.extra.cea.fr (8.14.7/8.14.7/CEAnet-Internet-out-4.0) with ESMTP id 10PEiNAM028933; Mon, 25 Jan 2021 15:44:23 +0100
Received: from pisaure.intra.cea.fr (localhost [127.0.0.1]) by localhost (Postfix) with SMTP id D1FAA2078D0; Mon, 25 Jan 2021 15:44:23 +0100 (CET)
Received: from muguet2-smtp-out.intra.cea.fr (muguet2-smtp-out.intra.cea.fr [132.166.192.13]) by pisaure.intra.cea.fr (Postfix) with ESMTP id C45FF207888; Mon, 25 Jan 2021 15:44:23 +0100 (CET)
Received: from [10.14.2.198] ([10.14.2.198]) by muguet2-sys.intra.cea.fr (8.14.7/8.14.7/CEAnet-Internet-out-4.0) with ESMTP id 10PEiNI9026458; Mon, 25 Jan 2021 15:44:23 +0100
Subject: Re: IPv6 certification - IPv6 Router Advertisement Lifetime 0 and Reachable time 10 seconds
To: Nick Hilliard <nick@foobar.org>
Cc: ipv6@ietf.org
References: <CAGeZV=Q=awxFd=vsfBiBC2vt7o3Wkm9ECMSi+UU90ATKmHY32Q@mail.gmail.com> <BAB67E82-9BE8-4E7A-8548-5475E93FD137@employees.org> <CAGeZV=T4B5m7RYrKL4a4peQjZAoJiUqNv7V=0iaz5VdWeSTKng@mail.gmail.com> <08841dc2-9a4e-dacb-174a-a8f4cdfca1c7@gmail.com> <b0b05fa4-532f-98cd-ac41-28cc716a23df@foobar.org>
From: Alexandre Petrescu <alexandre.petrescu@gmail.com>
Message-ID: <9ea964a1-4722-c8b4-5c95-e0883b162bf1@gmail.com>
Date: Mon, 25 Jan 2021 15:44:23 +0100
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.6.1
MIME-Version: 1.0
In-Reply-To: <b0b05fa4-532f-98cd-ac41-28cc716a23df@foobar.org>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Language: fr
Content-Transfer-Encoding: 8bit
Archived-At: <https://mailarchive.ietf.org/arch/msg/ipv6/2RwvQ_9me0Ode9N00xRCENs2nHQ>
X-BeenThere: ipv6@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: "IPv6 Maintenance Working Group \(6man\)" <ipv6.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ipv6>, <mailto:ipv6-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ipv6/>
List-Post: <mailto:ipv6@ietf.org>
List-Help: <mailto:ipv6-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ipv6>, <mailto:ipv6-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 25 Jan 2021 14:44:35 -0000


Le 25/01/2021 à 13:11, Nick Hilliard a écrit :
> Alexandre Petrescu wrote on 25/01/2021 09:24:
>> It might be wrong.
> 
> it is wrong.  RA lifetime = 0 means: don't install this router as a 
> default router.

YEs, it means to not install rhis router now as a default router, but 
maybe do it later.

It is a matter of local configuration, but an Ethernet subnet might have 
several routers with lifetime==0 and one router with lifetime non-zero 
(the default router).  All these routers would rather have the same 
reachable time 10seconds.  The reachable time would depend on the kind 
of link layer technology, which is only one.


   Host1   Host2  ... Hostn
    |       |          |
   ------------------------
      |        |         |
      R1       R2        R3
      |
     Internet



and later on, when R1 fails, the situation would become:

   Host1   Host2  ... Hostn
    |       |          |
   ------------------------
              |         |
              R2        R3
              |
            Internet

Alex

> 
> Nick

v2.2.0 | Report a Bug | By Email