RE: Can wavelength availability information be carried by OSPF-Ext for GMPLS?

["#SHEN SHU#" <PG03053527@ntu.edu.sg>]

Hi, Eiji Oki,

Regarding your ID (draft-oki-ipo-optlink-req-00.txt), I have the following question:

How is flooding of optical link information originated? Is it triggered by event of link change? 
--If yes, won't the frequent wavelength availability change impact OSPF convergence?
--If no, how often will the timer be? Use the OSPF 30min max timer? how could up-to-date information garrentteed or approached?

I am not quite sure if such details should be included in your ID or stated in another document.
If it's out of your scope, is there any other doc takeing care of this?

Your kindly answers/clarifications will be highly appreciated.

Best regards, 
Shu SHEN 
Research student 
Network Technology Research Center 
Nanyang Technological University, Singapore 
Personal Website: http://shenshu.myip.org/


-----Original Message-----
From: #SHEN SHU# 
Sent: Sunday, June 09, 2002 10:56 PM
To: 'Ravi Ravindran'
Cc: 'ccamp@ops.ietf.org'; 'oki.eiji@lab.ntt.co.jp'
Subject: RE: Can wavelength availability information be carried by OSPF-Ext for GMPLS?


Hi, Ravi,

I don't quite understand why you say information such as wavelength availability is "strictly binds to data plane".
Is this because of wavelength availability is specific to LSC? or maybe a LSC from some vendors never use such information to make routing decisions?
Either reason I would not agree.
I think support for exchanging such information should be included within control plane, at least as an option.
Please explain further.

About the ID you suggested, do you know what's its current status? I found it's not on the IPO WG's ID list.
May be the authors of this ID can provide more information about it. 

Thanks a lot!

Cheers,
Shu

-----Original Message-----
From: Ravi Ravindran [mailto:rravindr@nortelnetworks.com]
Sent: Sunday, June 09, 2002 4:27 AM
To: #SHEN SHU#
Subject: RE: Can wavelength availability information be carried by OSPF-Ext for GMPLS?


OSPF-GMPLS extensions only try to address the common rourting issues relating to all non-packet switched interfaces. Extensions to things like you stated is more vendor specific, since that strictly binds to data plane property. 
The following ID discusses some ways to deal with LSC nodes. 
http://www.ietf.org/internet-drafts/draft-oki-ipo-optlink-req-00.txt 
Ravi 
-----Original Message----- 
From: #SHEN SHU# [mailto:PG03053527@ntu.edu.sg] 
Sent: Saturday, June 08, 2002 3:36 AM 
To: ccamp@ops.ietf.org 
Subject: Can wavelength availability information be carried by OSPF-Ext 
for GMPLS? 


Dear All, 
Regarding draft-ietf-ccamp-ospf-gmpls-extensions-07.txt, my understanding is that there's no way to exchange wavelength availability information with such extension. Is this right?
If a LSC router wants to make routing decision based on wavelength availability, how could it collect such information from each link of the network?
Or does the OSPF extension leaves wavelength assignment to LDP completely? 
Please comment, thanks! 
Best regards, 
Shu SHEN 
Research student 
Network Technology Research Center 
Nanyang Technological University, Singapore 
Personal Website: http://shenshu.myip.org/