Re: [dhcwg] dhcwg Digest, DHCP Renew vs Confirm

I don't think so.

2012/2/15 Timothy Winters <twinters@iol.unh.edu>

> Hi Huan,
>       Is it ok to transmit just a Renew message containing both the IA_NA
> and IA_PD when the link goes down?
>
> Regards,
> Tim
>
>
> On Feb 14, 2012, at 8:12 PM, Huan Huan <shawngespan@gmail.com> wrote:
>
> Hi Tim,
>
> I think CE Router may transmit Confirm msg containing the assigned IA_NA
> and Renew msg containing the assigned IA_PD separately.
>
> BR,
> Huan
>
> 2012/2/15 <dhcwg-request@ietf.org>
>
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>> Today's Topics:
>>
>>   1. I-D Action: draft-ietf-dhc-forcerenew-nonce-04.txt
>>      (internet-drafts@ietf.org)
>>   2. DHCP Renew vs Confirm (Timothy Winters)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Tue, 14 Feb 2012 02:40:41 -0800
>> From: internet-drafts@ietf.org
>> To: i-d-announce@ietf.org
>> Cc: dhcwg@ietf.org
>> Subject: [dhcwg] I-D Action: draft-ietf-dhc-forcerenew-nonce-04.txt
>> Message-ID: <20120214104041.23040.30559.idtracker@ietfa.amsl.com>
>> Content-Type: text/plain; charset="utf-8"
>>
>>
>> A New Internet-Draft is available from the on-line Internet-Drafts
>> directories. This draft is a work item of the Dynamic Host Configuration
>> Working Group of the IETF.
>>
>>        Title           : Forcerenew Nonce Authentication
>>        Author(s)       : David Miles
>>                          Wojciech Dec
>>                          James Bristow
>>                          Roberta Maglione
>>        Filename        : draft-ietf-dhc-forcerenew-nonce-04.txt
>>        Pages           : 12
>>        Date            : 2012-02-14
>>
>>   Dynamic Host Configuration Protocol (DHCP) FORCERENEW allows for the
>>   reconfiguration of a single host by forcing the DHCP client into a
>>   Renew state on a trigger from the DHCP server.  In Forcerenew Nonce
>>   Authentication the server sends a nonce to the client on the initial
>>   DHCP ACK that is used for subsequent validation of a FORCERENEW
>>   message.  This document updates RFC 3203.
>>
>>
>> A URL for this Internet-Draft is:
>> http://www.ietf.org/internet-drafts/draft-ietf-dhc-forcerenew-nonce-04.txt
>>
>> Internet-Drafts are also available by anonymous FTP at:
>> ftp://ftp.ietf.org/internet-drafts/
>>
>> This Internet-Draft can be retrieved at:
>> ftp://ftp.ietf.org/internet-drafts/draft-ietf-dhc-forcerenew-nonce-04.txt
>>
>>
>>
>> ------------------------------
>>
>> Message: 2
>> Date: Tue, 14 Feb 2012 08:43:50 -0500
>> From: Timothy Winters <twinters@iol.unh.edu>
>> To: dhcwg@ietf.org
>> Subject: [dhcwg] DHCP Renew vs Confirm
>> Message-ID: <C0CA95B6-1743-4D37-9BCC-D104453EBF9A@iol.unh.edu>
>> Content-Type: text/plain; charset=us-ascii
>>
>> Hello,
>>        While testing some CE Router implementations we have noticed a
>> interesting behavior that is within the specifications but not clearly
>> documented.  I wanted to get the working group thoughts on this.
>>
>>        Currently when a CE Router acting as a DHCP client, assigned both
>> IA_NA and IA_PD, is unplugged from the network.  When reattached to the
>> link the DHCP client transmits a DHCP Renew containing both the IA_NA and
>> the IA_PD.
>>
>>        3315 Section 18.1.2 says that when link goes down a DHCP client
>> implementation should transmit a DHCP Confirm message containing the
>> assigned IA_NA.
>>
>>        3633 Section 12.1 doesn't allow the use of the Confirm message.
>>  It states that DHCP Renew message, containing the assigned IA_PD, should
>> be used when the link goes down.
>>
>>        According to the specifications a DHCP client should retransmit
>> DHCP Confirm and DHCP Renew when link goes up.   The behavior we are seeing
>> is the DHCP client transmits a DHCP renew containing both the IA_NA and
>> IA_PD.
>>
>>        This behavior isn't causing interoperability issues as all the
>> servers we have tried still respond properly to the DHCP Renew messages.
>>
>>        Is it ok when a DHCP client loses link for it to transmit one DHCP
>> Renew message?
>>
>> Regards,
>> Tim
>> UNH-IOL
>>
>>
>>
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>> End of dhcwg Digest, Vol 94, Issue 13
>> *************************************
>>
>
>
>
> --
> Huan Huan
>
>

-- 
Huan Huan