Re: [mpls] Warren Kumari's No Objection on draft-ietf-mpls-flow-ident-06: (with COMMENT)
Stewart Bryant <stewart.bryant@gmail.com> Thu, 01 March 2018 20:05 UTC
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To: Warren Kumari <warren@kumari.net>, The IESG <iesg@ietf.org>
Cc: draft-ietf-mpls-flow-ident@ietf.org, mpls-chairs@ietf.org, Loa Andersson <loa@pi.nu>, mpls@ietf.org
References: <151545507568.9472.16895179835870917877.idtracker@ietfa.amsl.com>
From: Stewart Bryant <stewart.bryant@gmail.com>
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Date: Thu, 01 Mar 2018 19:57:03 +0000
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Subject: Re: [mpls] Warren Kumari's No Objection on draft-ietf-mpls-flow-ident-06: (with COMMENT)
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Hi Warren Thank you for this review. I have done all the nits and rewritten the run-ons for clarity along the lines you suggest. Best regards - Stewart On 08/01/2018 23:44, Warren Kumari wrote: > Warren Kumari has entered the following ballot position for > draft-ietf-mpls-flow-ident-06: No Objection > > When responding, please keep the subject line intact and reply to all > email addresses included in the To and CC lines. (Feel free to cut this > introductory paragraph, however.) > > > Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html > for more information about IESG DISCUSS and COMMENT positions. > > > The document, along with other ballot positions, can be found here: > https://datatracker.ietf.org/doc/draft-ietf-mpls-flow-ident/ > > > > ---------------------------------------------------------------------- > COMMENT: > ---------------------------------------------------------------------- > > Thank you for writing this, I think it is a useful document -- however, it does > have a number of nits which would be nice to address (if you make any other > edits). > > Nits: > Section 1. Introduction > O: "flow identification.The key" > P: "flow identification. The key" > R: missing space > > O: performance monitoring of MPLS flows when MPL is used for the encapsulation > of user data packets. P: performance monitoring of MPLS flows when MPLS is used > for the encapsulation of user data packets. R: Typo for MPLS? > > O: Indeed it is important that any flow identification technique be invisible > to them and that no remnant of the identification of measurement process leaked > into their network. P: Indeed it is important that any flow identification > technique be invisible to them and that no remnant of the identification of > measurement process leaks into their network. R: Tense / readability. > > Section 3. Loss Measurement Considerations > > O: Modern networks, if not oversubscribed, potentially drop relatively > P: Modern networks, if not oversubscribed, generally drop relatively > C: "potentially" makes it sound like this might happen. If a network isn't > oversubscribed it usually won't drop packets. > > Section 4. Delay Measurement Considerations > O: Most of the existing delay measurement methods are active measurement that > depend on the extra injected test packet to evaluate C: I think that this > should be "active measurements" or "active methods". I'm also confused by the > singular of "packet". > > O: Also, for injected test packets, these may not be co-routed with the data > traffic due to ECMP, or various link aggregation technologies all of which > distribute flows across a number of paths at the network, or data-link and > hence at the physical layer. C: This sentence is a run on / really confusing. I > know what you are trying to say, but this doesn't communicate it well. Perhaps > "Due to ECMP (or link aggregation techniques) injected test packets may > traverse other links than the data traffic."? Still not great, but I think > easier to parse. > > Section 5. Units of identification > > O: In particular note that there may be a need to impose identify at several > different layers of the MPLS label stack. P: "identity" (or perhaps > "identification"?) > > O: Such fine grained resolution may be possible by deep packet inspection, but > this may not always be possible, or it may be desired to minimize processing > costs by doing this only in entry to the network, and adding a suitable > identifier to the packet for reference by other network elements. C: This feels > like a run on. Also I *think* it is "fine-grained" and "on entry to the > network" (nits) > > O: This allows for the case of instrumenting multiple LSPs operate between the > same pair of nodes. P: This allows for the case of instrumenting multiple LSPs > operating between the same pair of nodes. C: Readability. > >
- [mpls] Warren Kumari's No Objection on draft-ietf… Warren Kumari
- Re: [mpls] Warren Kumari's No Objection on draft-… Stewart Bryant