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Re: [v6ops] New Version Notification for draft-yourtchenko-ra-dhcpv6-comparison-00.txt (fwd)

Mark ZZZ Smith <markzzzsmith@yahoo.com.au> Thu, 05 December 2013 19:50 UTC

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Date: Thu, 05 Dec 2013 11:50:00 -0800
From: Mark ZZZ Smith <markzzzsmith@yahoo.com.au>
To: Alexandru Petrescu <alexandru.petrescu@gmail.com>, Ole Troan <otroan@employees.org>
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Cc: V6 Ops List <v6ops@ietf.org>
Subject: Re: [v6ops] New Version Notification for draft-yourtchenko-ra-dhcpv6-comparison-00.txt (fwd)
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----- Original Message -----

> From: Alexandru Petrescu <alexandru.petrescu@gmail.com>
> To: Ole Troan <otroan@employees.org>
> Cc: V6 Ops List <v6ops@ietf.org>
> Sent: Friday, 6 December 2013 2:19 AM
> Subject: Re: [v6ops] New Version Notification for draft-yourtchenko-ra-dhcpv6-comparison-00.txt (fwd)
> 
> Le 05/12/2013 16:06, Ole Troan a écrit :
>>  Alexandru,
>> 
>>>  For example, Prefix Delegation is only specified for DHCPv6 (not
>>>  for RA), whereas the MTU parameter, and default router parameters
>>>  (IP address, MAC address) are only for the RA (not for DHCP).
>> 
>>  that's because prefix delegation is a stateful operation that
>>  requires per requesting router / client binding state. the general
>>  principle is "DHCPv6 can give different information to different
>>  clients, RA give the same information to everyone."
> 
> YEs, I agree.
> 

RAs can be used to distribute client specific parameters, for the parameters that RAs carry, as has been implemented in the widely deployed radvd open source RA daemon (see the 'clients' option).

A mechanism to distribute these client specific RA parameters to routers isn't commonly available, however RADIUS could be used for that purpose, similar to how RADIUS is being used to distribute parameters to a router located DHCPv6 server. 


> Alex
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> (and, as with all preceding points it is also a yes/no matter.
> 
> The address assignment (not only Prefix Delegation) DHCP is also a
> stateful matter needing binding state about the requester.
> 
> Yes, the RA also (not only DHCP) can give different information to
> different clients, as may be used in Proxy Mobile IPv6 (the MAG gives a 
> different prefix to each Host and the MAG emitting the RA keeps state 
> about that assignment).)
> 
>> 
>>  cheers, Ole
>> 
> 
> 
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