Re: I-D ACTION:draft-imajuku-ml-routing-02.txt

[Wataru Imajuku <imajyuku@exa.onlab.ntt.co.jp>]

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Hi, all.

 We have updated our routing draft attached below.
 We've recognized that interface switching capability descriptor (ISCD) 
being defined in routing protocols
lacks functionality in order to properly operate multilayer LSRs with 
LSC+PSC, LSC+DXC+PSC, and so on.
 So, we want to add definition of new interface descriptor called 
"interface adaptation capability descriptor".

 Background and aim of this proposal is to realize of multilayer routing 
domain which tunnels any kind of LSPs using the multilayer LSR.
 However, the proposed ISCD in this stage cannot properly express the LSP 
termination capability
in each multilayer LSR.
 I think this problems is very common especially in circuit switch capable 
such as LSC and DXC.
 In some case, these switches can have different capability between LSP 
forwarding capability and termination
capability. We already encountered this kind of problems in routing 
calculation of O-LSP.
 For example, a PXC-LSR can provide forwarding capability for any kind of 
O-LSPs, but termination capability
depends on the adaptation functionality attached to the PXC. But, the ISCD 
cannot effectively express such constraints for routing calculation.

 I'm happy and appreciate if we could share the problems I mentioned, and 
if you would support our proposal.
 I'm very much looking forward to see you at Yokohama, Japan !

Best Regards,
W. Imajuku@NTT


> A New Internet-Draft is available from the on-line Internet-Drafts directories.
>
>
>         Title           : Multilayer routing using multilayer switch capable
>                           LSRs
>         Author(s)       : W. Imajuku et al.
>         Filename        : draft-imajuku-ml-routing-02.txt
>         Pages           : 17
>         Date            : 01-Jul-02
>
> The integration of multilayer switching capabilities within one
> box, such as the packet-switch capability (PSC) and the lambda-
> switch capability (LSC) under the MPLS/Generalized-MPLS control
> mechanism, paves the way for achieving network resource optimization
> considering multilayer routing. This document clarifies the model of
> the GMPLS-controlled integrated PSC/LSC label switch router (LSR)
> and discusses the requirements of the routing extensions needed to
> achieve optimized multilayer traffic engineering.
>
> A URL for this Internet-Draft is:
> http://www.ietf.org/internet-drafts/draft-imajuku-ml-routing-02.txt
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---------------------------------------------
Wataru Imajuku
Research Engineer@NTT Network Innovation Labs.
807A, 1-1 Hikari-no-oka, Yokosuka, Kanagawa, Japan
Zip: 239-0847
E-mail: imajyuku@exa.onlab.ntt.co.jp
TEL: +81-468-59-4315
FAX: +81-468-59-3396