Re: [Pce] Switching type Constraint in PCEP

Just to complete the sequence of referenced I-Ds...

http://www.ietf.org/internet-drafts/draft-ietf-pce-inter-layer-req-04.txt 
discusses the requirements for multi-layer path computation (while 
http://www.ietf.org/internet-drafts/draft-ietf-pce-inter-layer-frwk-03.txt 
gives a framework for the use of PCE in a multi-layer network).

Section 5.1.3 of draft-ietf-pce-inter-layer-req-04.txt describes the 
specific requirements that you mention for switching type. And section 5.1.4 
discusses adaptation capabilities.

We have not, so far, added a requirement for encoding type and are not clear 
whether this is a constraint that is necessary. We'd be interested to have 
this discussion.

Before the Prague meeting, Eiji Oki started to put together the necessary 
protocol extensions in support of this work, but we held off publication 
because the base PCEP needed to advance a bit more. I guess this sounds like 
the community is ready for this draft now.

Cheers,
Adrian

----- Original Message ----- 
From: "LE ROUX Jean-Louis RD-CORE-LAN" <jeanlouis.leroux@orange-ftgroup.com>
To: "Dan Li" <danli@huawei.com>; "fabien.verhaeghe" 
<fabien.verhaeghe@atosorigin.com>; <pce@ietf.org>
Sent: Wednesday, March 28, 2007 11:18 AM
Subject: RE: [Pce] Switching type Constraint in PCEP

Hi Fabien,

The switching type/encoding type used to be carried in earlier versions of 
PCEP
( GENERALIZED LABEL OBJECT in 
http://www.watersprings.org/pub/id/draft-vasseur-pce-pcep-00.txt).
We decided to remove it from the base spec as this is application specific.
This will be covered in a separate document (for instance switching/encoding 
type could be encoded in a optional TLV of the LSPA object).

Best Regards,

JL

________________________________

De : Dan Li [mailto:danli@huawei.com]
Envoyé : mercredi 28 mars 2007 11:36
À : fabien.verhaeghe; pce@ietf.org
Objet : Re: [Pce] Switching type Constraint in PCEP

Hi Fabien,

There is a draft "draft-otani-ccamp-gmpls-cspf-constraints-05.txt" which may 
relate to this issue. But the switching/encoding type may be considered as 
an attribute of a TE-link, so I doubt it has something to do with the PCEP.

Regards,

Dan

----- Original Message ----- 
From: fabien.verhaeghe <mailto:fabien.verhaeghe@atosorigin.com>
To: pce@ietf.org
Sent: Wednesday, March 28, 2007 4:56 PM
Subject: [Pce] Switching type Constraint in PCEP

Hi,

In RFC4657 one of the generic requirement concerns the support of 
switching/encoding type constraint
for GMPLS.

Is there any ongoing work about this item?

Thanks
Fabien

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