RE: Optical impairments in draft-ietf-mpls-generalized-signaling- 04

["Diego Caviglia" <Diego.Caviglia@marconi.com>]

Ayan,

          Thanks for your answer but I don't understand why lambda conversion is
a  signalling  problem and thus is covered in generalized signalling draft while
others  optical  impairments  are  routing problem and are covered in a separate
document.

Moreover  even  if the document you quoted is a well written and very useful one
it  is  an  informative  contribution  that  simply  points  out  the physically
impairments  of  an  all  optical  network.  It doesn't propose any extension to
OSPF/IS-IS in order to support optical routing.

Given  that  in  an  All  Optical  Network  we  have  to  cope  with lots of new
information,  as  you  stated  in  your document, are we sure that OSPF, in this
environment, scales?

I  mean if it doesn't scale for wavelength availability information distribution
why it has to scales for other optical impairment distribution?




----------------------------------------------------------------
Diego Caviglia
Photonic Networks Design and Modelling
E-mail: diego.caviglia@marconi.com
Tel: +39 (0) 10 6003 808
Via A. Negrone 1A 16153 Genoa (Italy)
http://www.marconi.com






Ayan Banerjee <abanerjee@calient.net> on 25/06/2001 22.26.02
                                                                                
                                                                                
                                                                                


                                                              
                                                              
                                                              
 To:      Diego Caviglia/MAIN/MC1@MCMAIN,                     
          petera@nortelnetworks.con, ccamp@ops.ietf.org       
                                                              
 cc:      Giovanni Fiaschi/MAIN/MC1@MCMAIN                    
                                                              
                                                              
                                                              
 Subject: RE: Optical impairments in                          
          draft-ietf-mpls-generalized-signaling-  04          
                                                              







Diego,

Please see draft-ietf-ipo-impairments-00.txt for optical constraints.

Thanks,
Ayan


-----Original Message-----
From: Diego Caviglia [mailto:Diego.Caviglia@marconi.com]
Sent: Monday, June 25, 2001 6:19 AM
To: petera@nortelnetworks.con; ccamp@ops.ietf.org
Cc: Giovanni Fiaschi
Subject: Optical impairments in draft-ietf-mpls-generalized-signaling-04




Peter ,all,

           a  comment  about  draft-ietf-mpls-generalized-signaling-04.  In
the
draft  there is the label set object that is very useful in All optical
networks
with  CI-incapable  nodes  but  lambda  conversion  is  only one of the
problems
related  to  path  establishment  in  such networks.  I mean what about OSNR
and
non-linear  impairments? What about gain variation and power equalization?
Where
are covered these topic?

If  I  can  find  a  path  feasible from the lambda continuity point of view
who
assure me that I have the needed Q at the end of the all optical path?

Best regards.




----------------------------------------------------------------
Diego Caviglia
Photonic Networks Design and Modelling
E-mail: diego.caviglia@marconi.com
Tel: +39 (0) 10 6003 808
Via A. Negrone 1A 16153 Genoa (Italy)
http://www.marconi.com