Re: [v6ops] draft-ietf-6man-grand : saving lookups

Mark Smith <markzzzsmith@gmail.com> Sun, 09 August 2020 09:40 UTC

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From: Mark Smith <markzzzsmith@gmail.com>
Date: Sun, 9 Aug 2020 19:40:00 +1000
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To: Jen Linkova <furry13@gmail.com>
Cc: "Pascal Thubert (pthubert)" <pthubert@cisco.com>, 6man <ipv6@ietf.org>, IPv6 Operations <v6ops@ietf.org>, Jen Linkova <furry@google.com>
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Subject: Re: [v6ops] draft-ietf-6man-grand : saving lookups
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On Sun, 9 Aug 2020, 19:29 Jen Linkova, <furry13@gmail.com> wrote:

> On Sat, Aug 8, 2020 at 9:38 PM Pascal Thubert (pthubert)
> <pthubert@cisco.com> wrote:
> > Maybe the host should renew the NCE in the router periodically ?
>
> GRAND currently focuses on 'a new address being added to the
> interface' scenario. It does not solve the case of a node starts using
> an already configured address after a long period of inactivity.
>
> I guess we can add to the very end of the Section 4.1.2 (the new text):
> "A node MAY send unsolicited NAs for its preferred addresses
> periodically to refresh the Neighbor Cache on the first hop routers."
>
> On the other hand it might pollute the router NC with entries for
> addresses which the node has configured but is not going to use.
>


Won't NUD probes keep those entries current in the routers' cache, even
though hosts may not be actively using them?

I've thought that something like GRAND + NUD is starting to approach an
address registration protocol, or at least, makes the routers' cache the
"active addresses on a link" database.

Regards,
Mark.


> What does the WG think?
>
>
>
>
>
> --
> SY, Jen Linkova aka Furry
>
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