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Re: Router Solicitations



Thank you all for your answers. If I have more follow-up questions I will post to the 6man list.

The background were just some theoretical considerations that we made about the IPv6 autoconfiguration and its "durability". The basic question was if a host would try to keep an address when using the autoconfiguration. To be precise: If it would would keep using a previously assigned address as its unicast source address in Router Solicitation requests even after being disconnected from and then reconnected to a link (or switched off and back on). Compared to DHCP for example were the servers usually reassign the same IP-Address to hosts. I know that with IPv6 nobody will care about IP-Addresses so much anymore but if they are somewhat persistent with the autoconfiguration they would still provide some recognizability.


Best regards
  Niklas

JINMEI Tatuya / 神明達哉 wrote:
At Tue, 17 Jun 2008 12:05:21 +0200,
Niklas Neumann <niklas.neumann@cs.uni-goettingen.de> wrote:

Thank you for your response. Just to make it perfectly clear to me:
How long is a unicast address valid?
Until its valid lifetime expires.

- Until the host gets disconnected from the link?
- Until some timeout expires (e.g. Router Lifetime, DHCP Lifetime)?
- Some other trigger (e.g. L2 trigger)?
So link disconnection or other L2 triggers are not supposed to have any impact on the lifetime?

No.

I don't know why you're so much worrying about such corner cases.
Maybe you have some specific implementation and/or situation in your
mind where the interpretation of these points matter much.  As a
separate followup indicated, you may want to explain your intended
scenario.  Otherwise the discussion would be superficial (e.g. I can
only say 'No' because it's the answer and I don't know the background
intent of the question).

p.s. I've not noticed this thread has been sent to v6ops.  The 6man
list (ipv6@ietf.org) would be a better place for this topic.

---
JINMEI, Tatuya
Internet Systems Consortium, Inc.


--
Niklas Neumann - University of Goettingen, Institute of Informatics
http://user.informatik.uni-goettingen.de/~nneuman1/
Tel: +49 551 39-14419