Re: [CCAMP] WG Last Call on draft-ietf-ccamp-lsp-diversity-03

"Zafar Ali (zali)" <> Fri, 07 February 2014 15:04 UTC

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From: "Zafar Ali (zali)" <>
To: Fatai Zhang <>, "BRUNGARD, DEBORAH A" <>, "" <>
Thread-Topic: [CCAMP] WG Last Call on draft-ietf-ccamp-lsp-diversity-03
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Date: Fri, 07 Feb 2014 15:04:56 +0000
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Subject: Re: [CCAMP] WG Last Call on draft-ietf-ccamp-lsp-diversity-03
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Hi Fatai, John-

We had a long discussion and agreement that draft-zhang-ccamp-route-exclusion-pathkey-00<> requires a PCE that needs to keep state of ALL LSPs it has served (as long as they exists in the network). There is also a scaling issue as it limits number of LSPs PCE can serve. So calling it is "simple" is NOT a correct statement. You solution requires a path-stateful PCE.

Also to note from last IETF meeting minutes:
Lou Berger: "PCE: operating without the PCE is still in the scope of this WG." Our solution is without the use of PCE (signaling based).


Regards … Zafar

From: Fatai Zhang <<>>
Date: Friday, February 7, 2014 1:50 AM
To: "BRUNGARD, DEBORAH A" <<>>, "<>" <<>>
Subject: Re: [CCAMP] WG Last Call on draft-ietf-ccamp-lsp-diversity-03

Hi Deborah and all,

I think you might have noticed that there is another draft (, which describe a simple solution to address the same requirement as draft-ietf-ccamp-lsp-diversity and there were lots of discussion on the both drafts in the WG list.

In my understanding from the WG discussion, I think many people prefer draft-zhang because it is more straightforward and simple.

The authors of draft-zhang tried to contact the authors of draft-ietf-ccamp-lsp-diversity to discuss how to move forward these drafts, but nothing happened.

Therefore, the guidance from the WG chairs on how to move forward the both drafts (e.g, pick up one of them to go or any other suggestions) would be appreciated.

Best Regards


Sent: Friday, February 07, 2014 4:06 AM
Subject: [CCAMP] WG Last Call on draft-ietf-ccamp-lsp-diversity-03


This starts a two-week working group last call on draft-ietf-ccamp-lsp-diversity-03.

This working group last call ends Feb. 20th. Please send your comments to the CCAMP mailing list.

Deborah and Lou