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Re: [v6ops] draft-ietf-v6ops-reducing-ra-energy-consumption WGLC

Lorenzo Colitti <lorenzo@google.com> Mon, 31 August 2015 08:41 UTC

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From: Lorenzo Colitti <lorenzo@google.com>
Date: Mon, 31 Aug 2015 17:41:21 +0900
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To: David Farmer <farmer@umn.edu>
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Subject: Re: [v6ops] draft-ietf-v6ops-reducing-ra-energy-consumption WGLC
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On Mon, Aug 31, 2015 at 2:12 PM, David Farmer <farmer@umn.edu> wrote:

> 7. Security Considerations
>
>    The frequency of multicast Router Advertisement messages on a network
> will be
>    significantly increased with the addition of Rouge Router
> Advertisements [RFC6104]
>    either from malicious activity or simply host misconfiguration.
> RA-Guard [RFC6105]
>    or ACLs, as discussed in section 3.3 of RFC6104, effectively mitigate
> increased
>    power consumption on battery-powered hosts that would be caused by any
> Rouge
>    Router Advertisements.
>

I think this paragraph is much too long. If your network does not have RA
guard, you have *way* bigger problems than just increased power
consumption. We can certainly mention RA guard in passing though.


>    While effective at ensuring proper default router information is
> delivered to hosts,
>    most of the other mitigation methods discussed in section 3 of RFC6104
> do not
>    prevent the additional Router Advertisement messages from getting to
> hosts and
>    therefore do not mitigate the power consumption issue.  Furthermore,
> some of the
>    methods deliver even more Router Advertisement messages to hosts,
> exasperating
>    the power consumption issue.
>

I think this text is superfluous. A host can always cause another host to
chew up battery by sending it unicast packets.

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