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question on draft-ietf-ccamp-gmpls-recovery-analysis-05.txt

  • From: "Lei Lei" <leil@buptnet.edu.cn>
  • Date: Mon, 16 May 2005 17:00:49 +0800
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Hello,everyone. I have a question about section 8.4.1 of draft-ietf-ccamp-gmpls-recovery-analysis-05.txt, which is about recovery resource sharing using GMPLS protocol suits.

In this section, it is mentioned that the Maximum Reservable Bandwidth, the Unreserved Bandwidth and the Maximum LSP Bandwidth of the OSPF-TE and GMPLS-OSPF protocols
provide the information needed to obtain the optimization of the network resources allocated for shared recovery purposes. However, I do not quite understand how this could be
done, although the contents of this section is devoted to giving an explanation. For example, it is mentioned that the value of Maximum Reservable Bandwidth is greater than the 
Maximum Link Bandwidth, then how to set this value? Is it some arbitrary value or computed by some equations? And why should the difference between the Maximum Reservable
Bandwidth and the Maximum LSP Bandwidth be the Maximum Shareable Bandwidth? I've read the [KODIALAM1],  [KODIALAM2] and [GLI] papers and I can understand their methods.
However, all their methods need some extensions to the current GMPLS protocols. Since the method mentioned in section 8.4.1 can use the current GMPLS protocols to realize
shared resource recovery, I'm very interested, although quite confused as well. I'll really appreciate it if anyone can give me a related paper or some explanations of this method. Thank you!

Best regards.

Lei Lei

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