Re: Moving right along ... Switching Type

[Yangguang Xu <xuyg@lucent.com>]

Yakov,

I guess Ewart gave an example.

Just a clarification: to R1 and R2, the connection can be treated as a single
entity, while to the optical network, it's two trails interconnected by the
adaptation function. That's why I said that there were actually two LSPs within.

Yangguang

Yakov Rekhter wrote:
> 
> Yangguang,
> 
> > > Let me see if I understand your proposal. Consider the following
> > > example:
> > >
> > >    R1---OXC1---OXC2----R2
> > >
> > > where the TE interface on R1 is a collection of GigE ports, and the TE
> > > interface on R2 is a collection of OC-48 ports. Are you saying that
> > > establishing an LSP between R1 to R2 makes sense ?
> > >
> >
> > If you have adaptation function in either OXCs, it then makes sense. And
> > sure, you can also treat the R1-R2 connection as two LSPs separated by the
> > adaptation function.
> 
> Please note that R1 (a router) uses Ethernet encapsulation when sending
> data on the GigE port. Please also note that R2 (also a router) expects
> to have HDLC encapsulation when receiving data on its OC-48 port.
> As Maarten said in his e-mail, " 1GE port on R1 and OC-48 port on
> R2 "don't speak the same language".
> 
> So, with this in mind perhaps you could elaborate on what sense does
> it make to have an LSP between R1 and R2.
> 
> Yakov.