The MPLS WG Archive

[Nabil Seddigh <nseddigh@tropicnetworks.com>]

Sami,

Currently, the CLASSTYPE object cannot really be used with 
E-LSPs in the manner you describe. The CLASSTYPE object is only
useful with L-LSPs.

In order to utilize the concept of bandwidth pools in E-LSP,
one needs to be able to signal traffic parameters per class 
or per-PSC. That capability is not present in the standards today.

The closest proposal to achieve what you describe is the following:
http://www.ietf.org/internet-drafts/draft-ganti-mpls-diffserv-elsp-00.txt

Best,
Nabil Seddigh

> 
> Your understanding that the CLASSTYPE is used to
> specify the bandwidth pool to be used for allocating
> resources during LSP Setup is correct. In this context,
> the service class which is signalled via EXP bits
> (in the case of E-LSPs) dictate the treatment given
> to the individual packets, and the CLASSTYPE, which
> is signalled per LSP, dictates where the bandwidth
> is coming from (used in CAC).
> 
> [....deleted....]
>
> Ideally, I would prefer to get rid of the CLASSTYPE
> concept and advertise available bandwidth per service class.