Re: [Teas] I-D Action: draft-ietf-teas-rsvp-te-scaling-rec-02.txt

Pavan,

Some initial feedback on this pretty interesting draft:

Arguably the time in which an RSVP node is likely to receive the greatest number of messages within a short period is during the recovery period in graceful restart, as per RFC 3473 and RFC 5063.  I think this draft should at least describe how the proposals would operate during graceful restart and any associated advantages/disadvantages.

Section 2.1.3: I think you should justify your proposal here.  And, also, how long do you keep retransmitting the Path/Resv messages in the absence of an Ack?  Indefinitely?  And isn't this potentially just re-introducing refresh messages surreptitiously, something the draft discourages?

(In fact, generally, I think the draft could benefit from some more/better justification for the key changes that are proposed in several places.)

There are no RSVP "Tear/Err" messages ;-)  While I think I know what you mean, I think you should list the complete message types each time or explicitly define what you mean by "Tear/Err" messages the first time you use this term.

Section 2.1.1: "Must support retransmit of"

Lastly, the following paper is an excellent analysis of the relative merits of soft state vs hard state protocols etc and the conclusions may be of interest:
"A Comparison of Hard-State and Soft-State Signaling Protocols", P. Ji, Z. Ge, J. Kurose. D.Towsley,  ACM SIGCOMM 2003
http://conferences.sigcomm.org/sigcomm/2003/papers/p251-ji.pdf

Regards,
Femi

From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Vishnu Pavan Beeram
Sent: Thursday, September 22, 2016 2:47 AM
To: internet-drafts@ietf.org
Cc: teas@ietf.org; i-d-announce@ietf.org
Subject: Re: [Teas] I-D Action: draft-ietf-teas-rsvp-te-scaling-rec-02.txt

Folks, Hi!
We just submitted a new revision to keep the draft active. We intend to submit another version next month addressing the open issues.
Regards,
- Pavan (on behalf of the authors)

On Wed, Sep 21, 2016 at 9:41 PM, <internet-drafts@ietf.org<mailto:internet-drafts@ietf.org>> wrote:

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Traffic Engineering Architecture and Signaling of the IETF.

        Title           : Implementation Recommendations to Improve the Scalability of RSVP-TE Deployments
        Authors         : Vishnu Pavan Beeram
                          Ina Minei
                          Rob Shakir
                          Dante Pacella
                          Tarek Saad
        Filename        : draft-ietf-teas-rsvp-te-scaling-rec-02.txt
        Pages           : 11
        Date            : 2016-09-21

Abstract:
    The scale at which RSVP-TE Label Switched Paths (LSPs) get deployed
    is growing continually and the onus is on RSVP-TE implementations
    across the board to keep up with this increasing demand.

    This document makes a set of implementation recommendations to help
    RSVP-TE deployments push the envelope on scaling and advocates the
    use of a couple of techniques - "Refresh Interval Independent RSVP
    (RI-RSVP)" and "Per-Peer flow-control" - for improving scaling.

The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-teas-rsvp-te-scaling-rec/<https://urldefense.proofpoint.com/v2/url?u=https-3A__datatracker.ietf.org_doc_draft-2Dietf-2Dteas-2Drsvp-2Dte-2Dscaling-2Drec_&d=DQMFaQ&c=IL_XqQWOjubgfqINi2jTzg&r=JJQeumfRIljD_Xdmpw2mJTpe2LMPz89BlujcAESMjlM&m=3xPIjqMZYcB4mq0dHwH-DJB6LH9q6ph2soLETDBw8dY&s=faMavjDqfRgGvKs_hcbYP4o0CVR_1VlZ9UxvDSlmmCE&e=>

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-teas-rsvp-te-scaling-rec-02<https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_draft-2Dietf-2Dteas-2Drsvp-2Dte-2Dscaling-2Drec-2D02&d=DQMFaQ&c=IL_XqQWOjubgfqINi2jTzg&r=JJQeumfRIljD_Xdmpw2mJTpe2LMPz89BlujcAESMjlM&m=3xPIjqMZYcB4mq0dHwH-DJB6LH9q6ph2soLETDBw8dY&s=lHrpQYM8Omq7ZFhQL9kK1oFoznq0RyKr6v2gJGriEdo&e=>

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-teas-rsvp-te-scaling-rec-02<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_rfcdiff-3Furl2-3Ddraft-2Dietf-2Dteas-2Drsvp-2Dte-2Dscaling-2Drec-2D02&d=DQMFaQ&c=IL_XqQWOjubgfqINi2jTzg&r=JJQeumfRIljD_Xdmpw2mJTpe2LMPz89BlujcAESMjlM&m=3xPIjqMZYcB4mq0dHwH-DJB6LH9q6ph2soLETDBw8dY&s=OdORwji2ggNGII7m3d7Ry6HCh0n8f8anJen8-3E6YBY&e=>

Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org<https://urldefense.proofpoint.com/v2/url?u=http-3A__tools.ietf.org&d=DQMFaQ&c=IL_XqQWOjubgfqINi2jTzg&r=JJQeumfRIljD_Xdmpw2mJTpe2LMPz89BlujcAESMjlM&m=3xPIjqMZYcB4mq0dHwH-DJB6LH9q6ph2soLETDBw8dY&s=VyVll37aUocGzIiieDX_HAPlqFlVgDAZY_UFcFDRCFo&e=>.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/<https://urldefense.proofpoint.com/v2/url?u=ftp-3A__ftp.ietf.org_internet-2Ddrafts_&d=DQMFaQ&c=IL_XqQWOjubgfqINi2jTzg&r=JJQeumfRIljD_Xdmpw2mJTpe2LMPz89BlujcAESMjlM&m=3xPIjqMZYcB4mq0dHwH-DJB6LH9q6ph2soLETDBw8dY&s=9MWpDSdLRvjy1fXOI6ovEVkEm3I_4St8OjZ_dejs-ek&e=>

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