Hi, >From the definition, an empty PCUpd must contain an ERO, I think the question boils down to having an empty ERO or an ERO that mirrors the last ERO received. This is the only required parameter.
I would propose the following text to clarify: Section 5.5.3: Add: Upon reception of a PCUpd with D=0 a PCC MUST ignore the LSP object A bit and the ERO object content. With that the Empty (I would not introduce a NULL message) PCUpd contains SRP, LSP with PLSP-ID, all flags to 0, and an empty ERO. Br Cyril On 9 October 2014 14:33, Ramana Yarlagadda <ryarl...@juniper.net> wrote: > Hi All, > > I have a questions on sending the PCUpdate message to delegate an LSP from > PCE to PCC. Can somebody please help me here to understand the PCUpdate > message > For delegating an LSP back to PCC. > > Re-delegation section talks about empty message but the PCUpdate request > message definition > Says that all LSP parameters muse be sent. > > > 1. PCE requires to send an EMPTY LSP Update message to delegate an > LSP back to PCC. > > What is an acceptable empty LSP message? > > Please refer to section 5.5.5 of draft “PCEP extensions for stateful PCE” > for procedure of returning > Delegation > > > 1. Section 6.2 of draft “PCEP extensions for stateful PCE” defines > the PCUpd message. > > > - Three mandatory objects must be included in each PCUpd message. The > error codes > > Are defined to notify the sender if any of the mandatory objects missing > in the PCUpdate > Message. > > - Also, The draft says (copied text from section 6.2) > - > > “An LSP Update Request MUST contain all LSP parameters that a PCE wishes to > be set for the LSP. A PCC MAY set missing parameters from locally > configured defaults. If the LSP specified in the Update Request is > already up, it will be re-signaled. > > > A clear definition of NULL message would help us here. > > -thanks in advance > -ramana > > > > _______________________________________________ > Pce mailing list > Pce@ietf.org > https://www.ietf.org/mailman/listinfo/pce > >
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