RE: [dhcwg] dhcpv6-24: movement detection and Confirm message

Bernie,

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But a Renew is only directed to the one server and it is down or not on the network, the client gets no response. What should it do?
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Go look for another server and use the addresses as long as it can.  Confirm should not have been used to detect movement as Thomas stated.  What I am saying is Renew could be a hint.  If a response comes back all is golden.  But putting into the protocol that this works for that case is not ideal.

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If it gets a Reply, it does know it is on the same network as before.
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Or the server was smart enough to give it a new prefix was where I was going and then the node could have gone to a different link.  This requires no change to the spec.

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If it gets no Reply, it knows only that it may not be on the same network OR that the original server is down. 
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I see no advantage here over Renew and in fact disadvantage per Renew giving the client new addresses with new prefixes for that link.

regards,
/jim

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