Hi Acee, I think rather of the contrary, Static MPLS LSP must include TC and TTL. And Bottom-of-the-stack flag as well (I don't see it in grouping mpls-label-stack of the ietf-routing-types).
Regards, Greg On Mon, Jun 5, 2017 at 4:55 PM, Acee Lindem (acee) <[email protected]> wrote: > Greg, et al, > > From: Greg Mirsky <[email protected]> > Date: Monday, June 5, 2017 at 6:28 PM > To: "[email protected]" <draft-ietf-rtgwg-routing- > [email protected]>, "[email protected]" < > [email protected]> > Cc: Routing WG <[email protected]>, "[email protected]" <[email protected]> > Subject: MPLS label and LSE data models > Resent-From: <[email protected]> > Resent-To: Yingzhen Qu <[email protected]>, <[email protected]>, > Acee Lindem <[email protected]>, Christian Hopps <[email protected]>, < > [email protected]> > Resent-Date: Monday, June 5, 2017 at 6:28 PM > > Dear Authors, et.al, > I've got a question, or several of them, about data models of MPLS label > and MPLS label stack element (LSE). I ahve not followed the discussions and > apologize if these already were considered, discussed. > In the Routing Types document I've found that only MPLS label being > modeled but not the MPLS LSE. As result, models that use > rt-types:mpls-label, e.g. YANG DAta Model for MPLS Static LSPs, defines > outgoing labels not as array of LSEs but as array (leaf-list) of MPLS > labels. In the latter document I don't see how TTL and Traffic Class (TC) > are presented for each of labels in the array. Hence my questions: > > - should there be data model of MPLS LSE in rt-types (it does have TTL > and TC but separately); > > > - should data model of Static MPLS LSP use MPLS LSE model rather than > model of only 20 bit-long label. > > Where else so you see a requirement for a label stack with entries that > don’t contain TC and TTL? This seems specific to static provisioning of > static LSPs rather than a general requirement for ietf-routing-types. > > Thanks, > Acee > > > Appreciate you comments. > > Regards, > Greg > >
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