Tom Scott wrote:

> From the GMPLS/CCAMP TE draft:
>
>    Thus we have a more general notion of a TE link.  A TE link is a
>    "logical" link that has TE properties. The link is logical in a
>    sense
>    that it represents a way to group/map the information about certain
>    physical resources (and their properties) into the information that
>    is used by Constrained SPF for the purpose of path computation, and
>    by GMPLS signaling. This grouping/mapping must be done consistently
>    at both ends of the link. LMP [LMP] could be used to check/verify
>    this consistency.
>
> Has anyone written exercises that will work on affordable CCIE/CCNP
> labs?

In addition to TE, there's also the evolution toward a simplified stack for
those who
like to stay "close to the wire". An easy-read intro to GMPLS and the
simplified stack,
"Will GMPLS replace ATM and SONET/SDH in the next few years?":
http://198.11.21.25/capstoneTest/Students/Papers/docs/FinalPaper_Proceeding310218.pdf

See figure 1 (p. 2):

IP
ATM              IP               IP
SONET/SDH        ATM              SONET/SDH         IP/GMPLS
Optical/DWDM     Optical/DWDM     Optical/DWDM      Optical/GMPLS

As Cisco was a prime move in the CCAMP/GMPLS WG, I hope we'll see support in
IOS and
hardware soon, if not already, for labs related to minimal-stack optical
transport. I
understand that the intended application would be high-bandwidth cores at
OC-192,
OC-768 and into the terabit range. But it still should be possible to find
affordable
modules/interfaces that support, say, just a few lambdas, maybe using VCSELs
instead of
the more expensive lasers? Anybody building those gadgets in your basement?

-- TT




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