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

Nick Hilliard <nick@foobar.org> Sun, 24 January 2021 12:08 UTC

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Subject: Re: IPv6 certification - IPv6 Router Advertisement Lifetime 0 and Reachable time 10 seconds
To: Isaac <isaactheogaraj@gmail.com>
Cc: ipv6@ietf.org
References: <CAGeZV=RLrZwLgTusStv73gEuppxs40ijNXvGOWABH3U_Pqz-4Q@mail.gmail.com>
From: Nick Hilliard <nick@foobar.org>
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Date: Sun, 24 Jan 2021 12:08:40 +0000
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Isaac wrote on 24/01/2021 11:02:
> At the moment, we are unable to find a scenario (real world usecase) to 
> support RA lifetime of 0 and RA reachable time of 10 seconds. Please 
> review and respond.

Isaac,

you're referring to an IPv6 Forum document, so they might be more 
qualified to give an answer to your question.

As a potential pointer, rfc4861 documents the following case in section 
6.2.3:

>    A router might want to send Router Advertisements without advertising
>    itself as a default router.  For instance, a router might advertise
>    prefixes for stateless address autoconfiguration while not wishing to
>    forward packets.  Such a router sets the Router Lifetime field in
>    outgoing advertisements to zero.

Nick