Re: [OPSEC] Iotdir early review of draft-ietf-opsec-v6-21

Ted Lemon <> Tue, 16 February 2021 13:50 UTC

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From: Ted Lemon <>
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Date: Tue, 16 Feb 2021 08:49:58 -0500
In-Reply-To: <YCvKok+GGWE6JuGy@Space.Net>
Cc: Stuart Cheshire <>, =?utf-8?Q?=C3=89ric_Vyncke?= <>,, Warren Kumari <>
To: Gert Doering <>
References: <YCuf0JXkQLngR2Y1@Space.Net> <> <YCvKok+GGWE6JuGy@Space.Net>
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Subject: Re: [OPSEC] Iotdir early review of draft-ietf-opsec-v6-21
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On Feb 16, 2021, at 8:37 AM, Gert Doering <> wrote:
> Not sure what of that is "of course" and what "routes to the IoT network"
> might be…

Router Advertisements advertise routers, prefixes, and routes, among other things. They can advertise a default router (and hence a default route), or they can advertise a non-default router that provides more specific routes, for example to an IoT stub network. Unless you prefer that we just bridge constrained networks to Wifi or Ethernet infrastructure networks at layer 2?

See (update coming soon)

FWIW, the situation for IoT (stub) networks is no different than the situation for multi-homing: you have two routers connected to the same link, both multicasting RAs to the link. Which one do you want your network infrastructure to automatically filter?