On everything 😊 From: stephane.litkow...@orange.com [mailto:stephane.litkow...@orange.com] Sent: lunedì 13 novembre 2017 16:41 To: Daniele Ceccarelli <daniele.ceccare...@ericsson.com>; pce@ietf.org Subject: RE: draft-ietf-pce-association-diversity: relaxing constraint
Hi Daniele, Thanks for your feedback. If we go to a generic mechanism, IMO, this should be addressed in a separate document. In addition, we need a generic way for a PCC to tell the PCE that a constraint is relaxable or strict. For diversity, we have a dedicated flag within the DISJOINTNESS TLV for that purpose. Maybe we should make it generic as well. Do you agree ? Brgds, From: Daniele Ceccarelli [mailto:daniele.ceccare...@ericsson.com] Sent: Monday, November 13, 2017 16:33 To: LITKOWSKI Stephane OBS/OINIS; pce@ietf.org<mailto:pce@ietf.org> Subject: RE: draft-ietf-pce-association-diversity: relaxing constraint Hi Stephane, definitely needed. My opinion is that a way to say that a constraint was relaxed is very useful. As you said there are different types of constraints that can be relaxed, e.g. diversity or a TE bound. I would make the TLV as generic as possible and maybe define multiple sub-TLV (or maybe just multiple values) depending on the constraint that was relaxed. BR Daniele From: Pce [mailto:pce-boun...@ietf.org] On Behalf Of stephane.litkow...@orange.com<mailto:stephane.litkow...@orange.com> Sent: lunedì 13 novembre 2017 16:22 To: pce@ietf.org<mailto:pce@ietf.org> Subject: [Pce] draft-ietf-pce-association-diversity: relaxing constraint Hi WG, In the latest version of draft-ietf-pce-association-diversity we added a new TLV called RELAXED-CONSTRAINT-TLV to be used in LSP Object of a PCUpdate message when the PCE relaxes the requested disjointness constraint. For instance, if a PCC requests an SRLG disjoint path but the PCE cannot find it, it may relax the constraint (if PCC allows it to do so) and thus informs the PCC through the RELAXED-CONSTRAINT-TLV. IMO, this kind of behavior is more generic rather tied to the disjointness use case. It may be used with other constraints as well. The question is: do we need to keep this RELAXED-CONSTRAINT-TLV in the association-diversity draft ? or do we drop it ? or do we define a TLV more specific to the association diversity state ? maybe we can reuse the association group object in the PCUpdate message including the DISJOINTNESS-INFORMATION-TLV which reflects the actual disjointness style used by the PCE. Opinions ? Brgds, Stephane [Orange logo]<http://www.orange.com/> Stephane Litkowski Network Architect Orange/SCE/EQUANT/OINIS/NET Orange Expert Future Networks phone: +33 2 23 06 49 83 <https://monsi.sso.francetelecom.fr/index.asp?target=http%3A%2F%2Fclicvoice.sso.francetelecom.fr%2FClicvoiceV2%2FToolBar.do%3Faction%3Ddefault%26rootservice%3DSIGNATURE%26to%3D+33%202%2023%2028%2049%2083%20> NEW ! mobile: +33 6 71 63 27 50 <https://monsi.sso.francetelecom.fr/index.asp?target=http%3A%2F%2Fclicvoice.sso.francetelecom.fr%2FClicvoiceV2%2FToolBar.do%3Faction%3Ddefault%26rootservice%3DSIGNATURE%26to%3D+33%206%2037%2086%2097%2052%20> NEW ! stephane.litkow...@orange.com<mailto:stephane.litkow...@orange.com> _________________________________________________________________________________________________________________________ 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. _________________________________________________________________________________________________________________________ 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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