Hi Ina, Thanks for the text proposal. I have an issue with : “ERO object SHOULD contain at least one subobject”. What happens if there is no path ? This comes to another issue we have with implementations. Stateless PCEP uses NO-PATH object for PCE to inform PCC that there is no path available. Today, stateful PCE does not rely on NO-PATH object, so implementations uses empty ERO to encode NO-PATH.
So if a PCC receives a PCUpd with empty ERO, it should remove the existing path of the LSP and it should report PCRpt with empty ERO. This happens also when LSP is configured and first reported with no path. So I’m not sure we can state ERO SHOULD contain at least one subobject. Best Regards, Stephane From: Ina Minei [mailto:[email protected]] Sent: Thursday, July 28, 2016 20:23 To: Robert Varga Cc: LITKOWSKI Stephane OBS/OINIS; [email protected] Subject: Re: [Pce] draft-ietf-pce-stateful-pce : clarifying the End Of Synchronization marker Although section 6.1 shows ERO as mandatory, it doesn't actually state that, how about the following text? "The intended path, represented by the ERO object, is REQUIRED. If the ERO ojbect is missing, the receiving PCE MUST send a PCErr message with Error-type=6 (Mandatory Object missing) and Error-value to be assigned by IANA (ERO object missing). When present, the ERO object SHOULD contain at least one subobject, representing the destination of the LSP." On Thu, Jul 28, 2016 at 11:10 AM, Ina Minei <[email protected]<mailto:[email protected]>> wrote: Yes, ERO is always mandatory, section 6.1 clearly states that. On Mon, Jun 27, 2016 at 4:46 AM, Robert Varga <[email protected]<mailto:[email protected]>> wrote: On 06/23/2016 03:54 PM, [email protected]<mailto:[email protected]> wrote: > Hi again, > > We also found an issue when a PCC removes a LSP. It would be good to precise > the objects that are mandatory, optional in this case also. > Some PCE implementations are waiting for an ERO in the PCRpt that removes an > LSP, while some PCC does not send an ERO. > Would be good to clarify the procedure of LSP removal. Hello, I think section 6.1 on PCRpt message format covers this: ERO is mandatory in all cases. I could not find any text which would imply this should not be the case for R=1. Bye, Robert _______________________________________________ Pce mailing list [email protected]<mailto:[email protected]> https://www.ietf.org/mailman/listinfo/pce _________________________________________________________________________________________________________________________ Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce message par erreur, veuillez le signaler a l'expediteur et le detruire ainsi que les pieces jointes. Les messages electroniques etant susceptibles d'alteration, Orange decline toute responsabilite si ce message a ete altere, deforme ou falsifie. Merci. This message and its attachments may contain confidential or privileged information that may be protected by law; they should not be distributed, used or copied without authorisation. If you have received this email in error, please notify the sender and delete this message and its attachments. As emails may be altered, Orange is not liable for messages that have been modified, changed or falsified. Thank you.
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