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Re: [dhcwg] DHCPv6 Reply Message

"Ms. Li HUANG" <bleuoisou@gmail.com> Thu, 15 October 2020 03:03 UTC

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From: "Ms. Li HUANG" <bleuoisou@gmail.com>
Date: Thu, 15 Oct 2020 11:03:11 +0800
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To: Timothy Carlin <tjcarlin@iol.unh.edu>
Cc: Timothy Winters <tim@qacafe.com>, dhcwg <dhcwg@ietf.org>
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Subject: Re: [dhcwg] DHCPv6 Reply Message
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11:00.hk S8 oct. 15 2020


Once the ID block kept growing mac of the endpoints clients in there in
order to randomly assign ipv6 to transaction a pck, it would be required to
be renewed...?


Sincerely
Li HUANG




On Tue, Oct 6, 2020, 21:35 Timothy Carlin <tjcarlin@iol.unh.edu> wrote:

> Hi Tim,
>
> Thank you for your response.  I appreciate the clarification.
>
> Best Regards,
> Tim
>
> On Fri, Oct 2, 2020 at 2:50 PM Timothy Winters <tim@qacafe.com> wrote:
>
>> Hi Tim,
>>
>> My reading is the DHCPv6 client must continue to transmit Renew messages
>> until receiving an Reply message containing the IA_Addr option that needs
>> to be renewed as it's not supposed to be updated on the client.
>>
>> Retransmitting with the same transaction id seems to be correct behavior.
>>
>> ~Tim
>>
>> On Fri, Oct 2, 2020 at 2:00 PM Timothy Carlin <tjcarlin@iol.unh.edu>
>> wrote:
>>
>>> Hi dhcwg,
>>>
>>> A question has come up regarding how to handle the situation where a
>>> DHCPv6 Client receives a Reply to a Renew Message.
>>>
>>> For a Renew transaction, how should a client process a Reply message
>>> that contains a valid IA_NA, but does not contain any IA Address option?
>>> The Reply message is otherwise valid and complete.
>>>
>>> RFC 3315 says this:
>>>
>>>    If the Reply was received in response to a Solicit (with a Rapid
>>>>    Commit option), Request, Renew or Rebind message, the client updates
>>>>    the information it has recorded about IAs from the IA options
>>>>    contained in the Reply message:
>>>> ...
>>>>    -  Leave unchanged any information about addresses the client has
>>>>       recorded in the IA but that were not included in the IA from the
>>>>       server.
>>>
>>>
>>> RFC 8415 updated the word addresses, and instead uses "leases":
>>>
>>>    -  Leave unchanged any information about leases the client has
>>>>       recorded in the IA but that were not included in the IA from the
>>>>       server.
>>>
>>>
>>> Should the client continue the same Renew transaction (same transaction
>>> id) and retransmit as the IA Address Option was not included, or process
>>> the Reply, update T1/T2 and start a new Renew transaction (new transaction
>>> id) at T1?
>>>
>>> Thanks,
>>> Tim Carlin
>>> UNH-IOL
>>>
>>> _______________________________________________
>>> dhcwg mailing list
>>> dhcwg@ietf.org
>>> https://www.ietf.org/mailman/listinfo/dhcwg
>>>
>> _______________________________________________
> dhcwg mailing list
> dhcwg@ietf.org
> https://www.ietf.org/mailman/listinfo/dhcwg
>

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