The MPLS WG Archive

[Alessandro Bosco <bosco@coritel.it>]

Dear Sir/Madam,

I have some questions about routing within an optical MPLS networks
(MPLS/MPL(ambda)S).

In the draft "Multi-Protocol Lambda Switching: Combining MPLS Traffic
Engineering Control With Optical Cross-connects", it is affirmed the
following phrase:

" The proposed OXC control plane uses the IGP extensions for MPLS
traffic engineering to distribute relevant optical transport network
state information, including topology state information. This state
information is subsequently used by a constraint-based routing system to
compute paths for point-to-point optical channels through the optical
transport network."

I would like to know if:

a. Considering explicit paths calculation through an optical MPLS
network, ingress
    routers or third part tools, at the input of the network, will still
calculate the
    entire path (ingress to egress router), considering links within the
optical domain
    too?

b. Or, "new" OXCs, that use a control plane extended from MPLS traffic
    engineering control module, will be able to do optical routing, I
mean optical path
    calculation at the input of optical domain?

c. In the MPL(ambda)s framework, "new" OXCs has to be seen like optical
    routers?

Any response will be very appreciated.

Thanks in advance.

Best regards.

Alessandro

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