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List:       ipng
Subject:    Re: [IPv6] IPv6 host with only link-local address behaviour
From:       Brian E Carpenter <brian.e.carpenter () gmail ! com>
Date:       2023-11-30 20:49:17
Message-ID: 1cc74259-51ee-669f-cd05-7525f3e2ae8c () gmail ! com
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On 01-Dec-23 09:11, Ole Trøan wrote:
> 
> 
> > On 30 Nov 2023, at 21:02, Brian E Carpenter <brian.e.carpenter@gmail.com> wrote:
> > 
> > > On 01-Dec-23 08:31, Ted Lemon wrote:
> > > Suppose a large number of hosts exhibited this behavior. It's maybe fine if \
> > > it's just one wifi router, but it's a multicast, so on WiFi if enough devices \
> > > do this it can consume all available airtime.
> > 
> > That's a network that is "configured" with neither valid RAs nor DHCPv6. So yes, \
> > it's broken and wasting electricity.
> 
> It's configured with a perfectly fine RA (and DHCPv6) setup.
> 
> Just that the hosts that do not support DHCPv6 behave somewhat crankily, when \
> receiving an RA.

Ah, OK. I think my point about RFC4861 stands, though.

> 
> Not sure if there are any valid use case for a host to send to GUA from LLA in this \
> case.

No. (In my get_addr_pairs() toy, I simply ruled that out as always an invalid \
choice.)

    Brian

> The RIPE probe is quite actively sending. A few packets a second doesn't make a big \
> dent of course. 
> O.
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