Re: WG Adoption request for draft-mirsky-bfd-mpls-demand

[Greg Mirsky <[e-mail]>]

Hi Carlos,
thank you for your interest in the draft and the questions. Please find my
answers in-line tagged GIM>>.

Regards,
Greg

On Thu, Oct 25, 2018 at 9:04 PM Carlos Pignataro (cpignata) <
[e-mail]> wrote:

> Xiao,
>
> Scanning through the draft, two questions:
>
> 1. What is the underlying mechanism to check liveness such that Demand can
> be used?
>
> https://tools.ietf.org/html/rfc5880#section-6.6
>
>    Demand mode requires that some other mechanism is used to imply
>    continuing connectivity between the two systems.  The mechanism used
> GIM>> The Poll sequence may also be used as such, and
> draft-ietf-bfd-multipoint-active-tail is the example of how the Poll
> sequence is used in BFD Demand mode.
>
> 2. Is this draft testing liveness of a path or a node?
>
> https://tools.ietf.org/html/draft-mirsky-bfd-mpls-demand-03#section-3
>
>    In this state BFD peers MAY remain as long as the egress LER is in Up
>    state.  The ingress LER MAY check liveness of the egress LER by
>    setting the Poll flag.  The egress LER will respond by transmitting
> GIM>> BFD does not differentiate between the path and, to certain extent,
> the node. From RFC 5880 Abstract:
>
   This document describes a protocol intended to detect faults in the
   bidirectional path between two forwarding engines, including
   interfaces, data link(s), and to the extent possible the forwarding
   engines themselves, with potentially very low latency.

>
> Thanks,
>
> — Carlos Pignataro
>
> On Oct 19, 2018, at 9:59 PM, [e-mail] wrote:
>
> I support WG adoption of this draft. Use of the demand mode for p2p LSP
> monitoring is feasible and required.
>
>
> Best Regards,
>
> Xiao Min
> 原始邮件
> *发件人：*JeffreyHaas <[e-mail]>
> *收件人：*[e-mail] <[e-mail]>;
> *日 期 ：*2018年10月18日 06:24
> *主 题 ：**WG Adoption request for draft-mirsky-bfd-mpls-demand*
> Working Group,
>
> The BFD chairs have received an adoption request for
> "BFD in Demand Mode over Point-to-Point MPLS LSP"
> (draft-mirsky-bfd-mpls-demand).
>
> https://datatracker.ietf.org/doc/draft-mirsky-bfd-mpls-demand/
>
> The adoption call will end on the Friday after IETF 103, November 9.
>
> Note that there is are existing IPR statements on this draft:
> https://datatracker.ietf.org/ipr/3301/
> https://datatracker.ietf.org/ipr/3104/
>
> Please indicate to the mailing list whether you support adoption of this
> draft.
>
> -- Jeff & Reshad
>
>
>
>