Re: [Dcpel] questions related to DCPEL scope

Hi Kathie

Please do not understand me wrong!
I am in favour of starting the DCPEL WG.
My concerns are related to the match between the DCPEL charter activities
and the work that has been by theITU-t, ETSI-tispan, DSL, packetcable, 3gpp, 
3gpp2,
ipshere, wimax  goups on the area of centralized control plane 
architectures.
I think that it is useful to start the work in DCPEL WG considering as 
starting point
the work that has been done already in the other groups.

Best Regards,
Georgios

----- Original Message ----- 
From: "Kathleen Nichols" <nichols@pollere.com>
To: "Georgios Karagiannis" <karagian@cs.utwente.nl>
Cc: <dcpel@ietf.org>
Sent: Thursday, February 23, 2006 10:47 PM
Subject: Re: [Dcpel] questions related to DCPEL scope

>
> Trimmed to reply (in-line) to your comments:
>
> Georgios Karagiannis wrote:
> ...
>>>
> [G]>>> Could you specify what do you mean by a distributed Difsserv 
> control
>>>> plane approach? Will this distributed approach impact an individual
>>>> Diffserv router, e.g., a Diffserv core router?
> [K]>> I'm just giving a short answer here. A distributed DiffServ control
>>> plane is one where the control plane actions do not reside in
>>> one physical location and probably not in one logical location.
>>> We would expect an impact on DiffServ edge routers, but probably
>>> not DiffServ core routers.
>>
>> Georgios: But I suppose that this will of depend on the specified PDBs.
>> What if a PDB requires a control plane support for a core Diffserv 
>> router?
>>
>
> If by core Diffserv router you mean a diffserv router interior to a
> domain, one would not normally expect the need for control of
> classifiers and policers, but just configuration of the PHBs as
> realized by queues and their scheduler, as described in RFC 2475
> and other diffserv documents. However, this doesn't preclude an
> operator from using the diffserv "edge" functions interior to a
> network if desired.
>
> ...
>> Georgios: Maybe it is very useful to perform an extensive state of the
>> art study on the area of centralized control plane architectures that
>> are developed in ITU-t, ETSI-tispan, DSL, packetcable, 3gpp, 3gpp2, 
>> ipshere, wimax. The outcome of this state of the art study could then
>> help to define
>> the final charter of the DCPEL BOF/WG.
>>
>
> Do you believe that the work of these groups obviates an IETF DCPEL WG?
>
> regards,
> Kathie
> 

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