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

Nick Hilliard <nick@foobar.org> Mon, 25 January 2021 15:09 UTC

Return-Path: <nick@foobar.org>
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 A015A3A1441 for <ipv6@ietfa.amsl.com>; Mon, 25 Jan 2021 07:09:41 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -0.001
X-Spam-Level:
X-Spam-Status: No, score=-0.001 tagged_above=-999 required=5 tests=[NICE_REPLY_A=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham 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 eUlxkvOm5a5Y for <ipv6@ietfa.amsl.com>; Mon, 25 Jan 2021 07:09:40 -0800 (PST)
Received: from mail.netability.ie (mail.netability.ie [46.182.8.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id E863D3A1440 for <ipv6@ietf.org>; Mon, 25 Jan 2021 07:09:39 -0800 (PST)
X-Envelope-To: ipv6@ietf.org
Received: from crumpet.local (admin.ibn.ie [46.182.8.8]) (authenticated bits=0) by mail.netability.ie (8.16.1/8.16.1) with ESMTPSA id 10PF9WPc052972 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 25 Jan 2021 15:09:32 GMT (envelope-from nick@foobar.org)
X-Authentication-Warning: cheesecake.ibn.ie: Host admin.ibn.ie [46.182.8.8] claimed to be crumpet.local
Subject: Re: IPv6 certification - IPv6 Router Advertisement Lifetime 0 and Reachable time 10 seconds
To: Alexandre Petrescu <alexandre.petrescu@gmail.com>
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> <9ea964a1-4722-c8b4-5c95-e0883b162bf1@gmail.com>
From: Nick Hilliard <nick@foobar.org>
Message-ID: <482bac5f-6f8f-5a93-ac2a-e537bd5a2c93@foobar.org>
Date: Mon, 25 Jan 2021 15:09:31 +0000
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.16; rv:52.0) Gecko/20100101 PostboxApp/7.0.45
MIME-Version: 1.0
In-Reply-To: <9ea964a1-4722-c8b4-5c95-e0883b162bf1@gmail.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Archived-At: <https://mailarchive.ietf.org/arch/msg/ipv6/mahrh4GNpazZe1XXzWqwdSllwEE>
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 15:09:42 -0000

Alexandre Petrescu wrote on 25/01/2021 14:44:
> YEs, it means to not install rhis router now as a default router, but 
> maybe do it later.

it means:

>     A Lifetime of 0 indicates that the router is not a
>     default router and SHOULD NOT appear on the default
>     router list.

+ other stuff like:

>    Note that system management may disable a router's IP forwarding
>    capability (i.e., changing the system from being a router to being a
>    host), a step that does not necessarily imply that the router's
>    interfaces stop being advertising interfaces.  In such cases,
>    subsequent Router Advertisements MUST set the Router Lifetime field
>    to zero.

Can you point the bit where RA Lifetime = 0 means "maybe do it later"?

Nick