Re: Moving right along ... Switching Type

[Maarten Vissers <mvissers@lucent.com>]

Yakov,

It depends on what your definition of "OXC" is... 

- if it is a box with fibers connected to it it can be a SDH/SONET ADM or cross
connect, in which case it makes a lot of sense... the 1GE physical interfaces
are terminated and the packets are mapped via GFP (Rec. G.7041) into
STS-3c-Xv/VC-4-Xv or STS-1-Xv signals for further transport. It is becoming
popular already to do this...
I.e. the transport network is very capable to mix and match different interface
types at its edges. Some other examples: DS3 - network - OC48, 100ME - network -
1GE, E1 - network - STM1, 1000BaseX - network - 1000BaseT

- if it is a box with just an optical fabric, it doesn't make sense of course...
1GE port on R1 and OC-48 port on R2 "don't speak the same language".

Regards,

Maarten

Yakov Rekhter wrote:
> 
> Zhi-Wei,
> 
> > <z>Maybe this is one where we need to ask individuals with operational
> > experience and have some experience with service provisioning whether
> > having one end with Ethernet and another end with OC-48 sounds like a
> > configuration that makes sense?
> 
> 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 ?
> 
> Yakov.
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