The MPLS WG Archive

[Alex Zinin <azinin@cisco.com>]

Neil,

>> > -       "server layer trails (in an OTN) = client layer links", and
>> networks
>> > operators *will* have to support multiple client layers for a very long
>> > time...including some large BW servives directly off the L1 fabric.
>> 
>> Not sure I follow the logic here. Can you elaborate a bit.
>> 
>         This is a really important point.  It is a fundamental
> characteristic of a layered network architecture.

Got it. I didn't realize what layers you meant.

>         BTW nested LSPs also fit this model.......but this has not been
> recognised yet.

It has been, actually.
The forwarding adjacencies, LSP hierarchy and generalized MPLS are
the mechanism to represent LSPs as links for higher layers,
perform signaling of different types of LSPs and LSP nesting.

Alex.