Re: draft-fizgeer-pce-pcep-bfd-parameters

Reshad Rahman <reshad@yahoo.com> Fri, 31 March 2023 21:43 UTC

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Date: Fri, 31 Mar 2023 21:43:01 +0000
From: Reshad Rahman <reshad@yahoo.com>
Reply-To: Reshad Rahman <reshad@yahoo.com>
To: "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>, Dhruv Dhody <dd@dhruvdhody.com>
Cc: "pce@ietf.org" <pce@ietf.org>, "draft-fizgeer-pce-pcep-bfd-parameters@ietf.org" <draft-fizgeer-pce-pcep-bfd-parameters@ietf.org>
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Subject: Re: draft-fizgeer-pce-pcep-bfd-parameters
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 Hi Dhruv, authors,
I just took a look at the document. Some high-level comments:
- The document name is bfd-parameters but the rest of the doc talks about S-BFD. Should the document be renamed fo sbfd-parameters?- The abstract mentions LSP parameters and S-BFD. In the intro, there's no mention of BFD, that seems to be an omission. IIUC, the goal is to carry S-BFD parameters per LSP or LSP group?- Why are Min Tx Interval and multiplier exchanged?- Looking at RFC7884, it's very clear what's the flow/relationship between S-BFD and OSPF (below). With PCEP, that relationship isn't very clear to me. Disclaimer: it's been a while since I looked at PCEP.   This document implicitly defines a relationship between OSPF and
   S-BFD.  S-BFD assigns one or more discriminators to each S-BFD
   reflector node.  OSPF, in turn, learns about these from S-BFD and
   floods them in the newly defined TLV.  After this information is
   flooded, it is stored in all the OSPF nodes such that S-BFD
   initiators can map out target nodes to target discriminators and can
   therefore construct the S-BFD probe.
- RFC7880 should be referenced.

Regards,Reshad.
    On Monday, March 27, 2023, 05:20:10 AM EDT, Dhruv Dhody <dd@dhruvdhody.com> wrote:  
 
 Hi BFD WG, 
We had a new I-D presented in the PCE WG session regarding enabling S-BFD (and carrying the parameters) for the LSP / SR-paths created by PCE via PCEP. 
https://datatracker.ietf.org/doc/draft-fizgeer-pce-pcep-bfd-parameters/00/

If you have any thoughts about this please let the PCE WG know! 
Thanks! Dhruv