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

Alexandre Petrescu <alexandre.petrescu@gmail.com> Sun, 24 January 2021 12:26 UTC

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Subject: Re: IPv6 certification - IPv6 Router Advertisement Lifetime 0 and Reachable time 10 seconds
To: ipv6@ietf.org
References: <CAGeZV=RLrZwLgTusStv73gEuppxs40ijNXvGOWABH3U_Pqz-4Q@mail.gmail.com>
From: Alexandre Petrescu <alexandre.petrescu@gmail.com>
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Date: Sun, 24 Jan 2021 13:26:09 +0100
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Le 24/01/2021 à 12:02, Isaac a écrit :
> IPv6 IETF team,
> 
> We have a query with regard to an enforcement by an IPv6
> certification body (University of New Hampshire Intereroperability
> Lab, http://www.ipv6forum.org <http://www.ipv6forum.org>, 
> http://www/ipv6ready.org <http://www/ipv6ready.org> ). In the
> following IPv6 router core protocol specification, the certification
> body mandates a vendor product support of a combination: Router
> Advertisement (RA) lifetime 0 & Router advertisement reachable time
> 10 seconds (Link 
> https://www.ipv6ready.org/docs/Core_Conformance_5_0_1.pdf 
> <https://www.ipv6ready.org/docs/Core_Conformance_5_0_1.pdf>,  page
> 174, section 2.2.15 Part B).

Yes, but which RFC is that?

I am asking because I can acceses RFCs securely on the ietf.org website
from my IPv6-only client; but when I try to access that ipv6ready.org
URL from that IPv6-only client the firefox browser displays an
exclamation mark on the lock near https (that exclamation mark does not
appear when I use IPv4 client).

> For us, it appeared that this combination of RA lifetime 0 and
> reachable time of 10 seconds may not be practical. Do you see any use
> case for the above mentioned combination? Are you aware of any vendor
> product configuration/scenario at which the above combination of
> values may be used? Do you think that the combination of RA lifetime
> of 0 and reachable time of 10 seconds should be mandated by
> certification body or this can be an optional support?
> 
> 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.

If the other router's (the default router, which has a lifetime
non-zero, and must be present, but you dont mention) reachable time is
10 seconds it might make sense that this router's lifetime (this is
presumably a backup router, to take the place of the default router) to
be also 10 seconds.

Alex

> 
> Thanks in advance!!! Isaac.
> 
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