Re: TE Requirements Draft - ELSP

[Nabil Seddigh <nseddigh@tropicnetworks.com>]

David,

I am sure my word crafting can be improved. Let me try to restate.
The basic intention is not to mandate that all of the below
must be supported. Rather it is to allow any of the below
combinations at the choice of the vendor and network operator.

Basically, it should be similar to how E-LSP and L-LSP are mandated 
in the mpls-diffserv-09 draft. i.e. if a vendor can only 
support L-LSP, they are compliant with that standard. If a vendor 
can only support E-LSP, they are also compliant. If a vendor can 
support both E-LSP and L-LSP they are also compliant. There are 
three possibilities. The TE WG should ensure that DS-TE allows 
similar possibilities.

Best,
Nabil


> > The DS-TE requirement needs to be written in such a way that all
> > options are possible:
> >
> > 1. It should allow use with L-LSP only,
> > 2. It should allow use with E-LSP only
> > 3. It should allow use with networks that deploy both L-LSP and E-LSP
> 
> If you want to allow cases 1 and 2, then you can't insert a paragraph
> into the standard mandating that every implementation must support both.
> 
> -- David