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Re: [PCN] New edge behaviour:draft-karagiannis-pcn-hose-edge-behaviour-00
Hello Georgios,
I think that the proposed combination of signalling and PCN-marking
really has advantages for solving the ECMP issue and am interested in
seeing how it would perform (in both the trunk and HOSE model). I think
the draft clearly explains the proposed mechanisms. I have two minor
remarks:
1) Maybe the addition of a short description of the actual ECMP problem
that is solved here would make the draft more complete.
2) Section 2, bullet 5a says:
"the interior SHOULD preferentially drop unmarked packets instead of
marked packets".
Shouldn't this be changed into:
"the interior node SHOULD preferentially drop unmarked or Threshold
marked packets instead of Excess marked packets"?
Best regards,
Arjen
> -----Original Message-----
> From: pcn-bounces at ietf.org [mailto:pcn-bounces at ietf.org] On
> Behalf Of Georgios Karagiannis
> Sent: woensdag 21 oktober 2009 15:59
> To: pcn at ietf.org
> Subject: [PCN] New edge
> behaviour:draft-karagiannis-pcn-hose-edge-behaviour-00
>
>
> Hi all
>
> During the last two IETF meetings I had promissed to publish
> the HOSE edge behaviour draft.
>
> Via the following URL you can find this draft:
>
> http://www.ietf.org/id/draft-karagiannis-pcn-hose-edge-behavio
> ur-00.txt
>
> If you have any comments please let me know!
>
> --------------------------------------------------------
>
> Abstract ++
>
> Precongestion notification (PCN) is a means for protecting
> quality of
> service for inelastic traffic admitted to a Diffserv domain. The
> overall PCN architecture is described in RFC 5559. This
> memo is one
> of a series describing possible boundary node behaviours for a PCN
> domain. The behaviour described here is denoted as the HOSE model.
> In this document the term HOSE is referring to the
> aggregation of incoming traffic from all ingress edges, which is
> associated with one traffic class, i.e., PHB, towards one egress
> edge. This type of HOSE model is equivalent to the
> Multiple Point to
> Point (MP2P) type of aggregation.
>
> The HOSE model ensures bandwidth limits without the need of
> maintaining per each ingress and egress pair ingress-egress-
> aggregated states. In this case all edges maintain one aggregated
> state per each traffic class, i.e., PHB (Per Hop
> Behaviour), used in
> the PCN domain. Moreover, the HOSE model is able to
> provide solutions
> for the ECMP (Equal Cost Multi Path) problem for both admission
> control and flow termination procedures.
>
>
> -------------------------------------
>
>
>
> Best regards,
> Georgios
>
>
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