Re: [Gen-art] Genart telechat review of draft-ietf-intarea-probe-07
"Joel M. Halpern" <jmh@joelhalpern.com> Wed, 06 December 2017 16:16 UTC
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To: Ron Bonica <rbonica@juniper.net>, Stewart Bryant <stewart.bryant@gmail.com>, "gen-art@ietf.org" <gen-art@ietf.org>
Cc: "draft-ietf-intarea-probe.all@ietf.org" <draft-ietf-intarea-probe.all@ietf.org>, "int-area@ietf.org" <int-area@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "pals-chairs@tools.ietf.org" <pals-chairs@tools.ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, "l2tpext-chairs@ietf.org" <l2tpext-chairs@ietf.org>, The IESG <iesg@ietf.org>
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From: "Joel M. Halpern" <jmh@joelhalpern.com>
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Subject: Re: [Gen-art] Genart telechat review of draft-ietf-intarea-probe-07
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That would be fa reasoanble way to address my genart review question. Yours, Joel On 12/6/17 11:13 AM, Ron Bonica wrote: > Stewart, > > Having thought about it for a while, you may be right. PROBE was meant to be an IP tool. Pseudo-wire endpoints were an afterthought, and not a very good afterthought at that. > > Let's remove the E-bit (aka P-bit) and limit Probe to querying the status of IP interfaces. > > Ron > > >> -----Original Message----- >> From: Stewart Bryant [mailto:stewart.bryant@gmail.com] >> Sent: Wednesday, December 6, 2017 6:24 AM >> To: Ron Bonica <rbonica@juniper.net>; Joel M. Halpern >> <jmh@joelhalpern.com>; gen-art@ietf.org >> Cc: draft-ietf-intarea-probe.all@ietf.org; int-area@ietf.org; ietf@ietf.org; >> pals-chairs@tools.ietf.org; mpls-chairs@ietf.org; l2tpext-chairs@ietf.org; The >> IESG <iesg@ietf.org> >> Subject: Re: [Gen-art] Genart telechat review of draft-ietf-intarea-probe-07 >> >> I cannot quite work out from the document how this works, but if we are >> going to PING non-IP interfaces I think the groups that work on those need >> some time to reflect on the implications. >> >> There are certainly a number of non-IP interfaces that may have Ethernet >> addresses. >> >> However, I am not sure from a quick look at the text how you would address >> any interface running a PW other than Ethernet. >> >> Bottom line, I think this needs to either preclude non-IP interfaces, or the >> groups that work with non-IP interfaces need to think through the >> implications, and possibly propose new identifier types. >> >> - Stewart >> >> >> On 04/12/2017 22:48, Ron Bonica wrote: >>> Joel, >>> >>> The important piece of information is that this is a pseudowire endpoint. >> These days, most pseudowire endpoints seem to be Ethernet. But some >> aren't. There are still some legacy layer 2 pseudowires hanging around. >>> >>> So, since we can't enumerate every type of pseudowire endpoint, we >> might as well just call it a pseudowire endpoint and provide no further >> information about the type. >>> >>> >>> Ron >>> >>> >>>> -----Original Message----- >>>> From: Joel M. Halpern [mailto:jmh@joelhalpern.com] >>>> Sent: Monday, December 4, 2017 4:19 PM >>>> To: Ron Bonica <rbonica@juniper.net>; gen-art@ietf.org >>>> Cc: draft-ietf-intarea-probe.all@ietf.org; int-area@ietf.org; >>>> ietf@ietf.org >>>> Subject: Re: Genart telechat review of draft-ietf-intarea-probe-07 >>>> >>>> Thank you Ron. >>>> >>>> On the E-bit (or P-Bit), is the important goal that it is a virtual >>>> interface, that it is pseudowire, or ? It might help there text >>>> indicating what a receiver might do differently based on this bit being set >> or unset. >>>> Having said that, Ethernet Pseudowire is at least a clearer >>>> distinction than just "Ethernet". And as long as the bit has a clear >>>> definition, any disagreement about what "should" be identified is clealry >> NOT a show stopper. >>>> >>>> Yours, >>>> Joel >>>> >>>> On 12/4/17 4:13 PM, Ron Bonica wrote: >>>>> Hi Joel, >>>>> >>>>> Thanks for the review. Responses inline...... >>>>> >>>>> Ron >>>>> >>>>> >>>>>> -----Original Message----- >>>>>> From: Joel Halpern [mailto:jmh@joelhalpern.com] >>>>>> Sent: Thursday, November 30, 2017 4:45 PM >>>>>> To: gen-art@ietf.org >>>>>> Cc: draft-ietf-intarea-probe.all@ietf.org; int-area@ietf.org; >>>>>> ietf@ietf.org >>>>>> Subject: Genart telechat review of draft-ietf-intarea-probe-07 >>>>>> >>>>>> Reviewer: Joel Halpern >>>>>> Review result: Almost Ready >>>>>> >>>>>> I am the assigned Gen-ART reviewer for this draft. The General Area >>>>>> Review Team (Gen-ART) reviews all IETF documents being processed >> by >>>>>> the IESG for the IETF Chair. Please wait for direction from your >>>>>> document shepherd or AD before posting a new version of the draft. >>>>>> >>>>>> For more information, please see the FAQ at >>>>>> >>>>>> <https://urldefense.proofpoint.com/v2/url?u=https- >>>>>> >>>> >> 3A__trac.ietf.org_trac_gen_wiki_GenArtfaq&d=DwICaQ&c=HAkYuh63rsuhr >>>>>> 6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=Fch9FQ82sir-BoLx84hKuKwl- >>>>>> >>>> >> AWF2EfpHcAwrDThKP8&m=hKAAxSQXBFWxkxtwUUKzdYcvZ22_3zrp0OZhHK >>>>>> V2AH4&s=X_Kje37D5HB_DdICxGgn_TkAqoXymCuJdJetUjwYPy4&e=>. >>>>>> >>>>>> Document: draft-ietf-intarea-probe-07 >>>>>> Reviewer: Joel Halpern >>>>>> Review Date: 2017-11-30 >>>>>> IETF LC End Date: 2017-12-13 >>>>>> IESG Telechat date: 2017-12-14 >>>>>> >>>>>> Summary: This document is almost ready for publication as a >>>>>> Proposed Standard RFC. >>>>>> >>>>>> Major issues: >>>>>> I can not determine from the text why two identification objects are >>>>>> sometimes allowed, or how they are to be used. The texts >>>>>> seems to indicate >>>>>> that they can be somehow combined to identify a single probed >>>> interface. >>>>>> But I can not see how. >>>>> [RB ] >>>>> Good catch. >>>>> >>>>> At one time I thought that this was necessary because IPv6 >>>>> link-local >>>> addresses are not necessarily unique to the node. So, you might need >>>> to probe by IP address and something else (e.g., ifName). However, >>>> ifName is unique to the node. So, one instance of the interface >>>> identification object is enough. >>>>> I will remove that sentence. >>>>> >>>>> >>>>>> Minor issues: >>>>>> In section 2.1 in describing the usage when the probed interface is >>>>>> identified by name or ifindex, the text refers to MIBII, RFC >>>>>> 2863. I >>>> would >>>>>> expect to see it refer instead (or at least preferentially) to RFC 7223, >>>>>> the YANG model for the Interface stack. >>>>> [RB ] >>>>> Fair enough. I will make that change in the next version. >>>>> >>>>>> The E bit in the Extended ICMP Echo reply seems a bit odd. >>>>>> Shall we try >>>> to >>>>>> encode all the possible interface types in this field? Shall we try to >>>>>> distinguish Ethernet directly over fiber from Ethernet over ...? What >>>>>> about an emulated Ethernet interface (pseudowire, etc.) I do not >>>>>> understand why this is here, and fear it is ambiguous. >>>>> [RB ] >>>>> Looking back, I described that badly. This bit is set if the >>>>> interface is a >>>> pseudowire endpoint and it is running Ethernet. >>>>> Maybe I should call it the P-bit for Pseudowire endpoint. We don't >>>>> need to >>>> specify what type of pseudowire it is. >>>>> What do you think? >>>>> >>>>>> Nits/editorial comments: >>>>>> I find the description of the node containing the proxy >>>>>> interface as >>>> being >>>>>> "the probed node" as being somewhat odd, as it is not the >>>>>> node >>>> containing >>>>>> the probed interface. I would have expected it to be called "the >> proxy >>>>>> node"? >>>>> [RB ] >>>>> >>>>> Fair enough. I can make that change in the next revision. >>>>> >>>>>> Very nitpicky: In section 4, the step reading "If the Code Field is >> equal >>>>>> to No Error (0) and the L-bit is clear, set the A-Bit." probably ought to >>>>>> say "otherwise, clear the A-bit." >>>>>> >>>>> [RB ] >>>>> Fair enough. I can make that change in the next revision. >>>>> >>>>> >>> _______________________________________________ >>> Gen-art mailing list >>> Gen-art@ietf.org >>> https://urldefense.proofpoint.com/v2/url?u=https- >> 3A__www.ietf.org_mail >>> man_listinfo_gen-2Dart&d=DwICaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK- >> ndb3voDT >>> XcWzoCI&r=Fch9FQ82sir-BoLx84hKuKwl- >> AWF2EfpHcAwrDThKP8&m=3aYviNNhuXQukU >>> cgg_np7tq6-CJZDv9M_hHVW_ulyzo&s=7TxRC3k3Vsozba6OX8GmaFv_c- >> 9INm2pcVkjqx >>> sPpr0&e= >
- [Gen-art] Genart telechat review of draft-ietf-in… Joel Halpern
- Re: [Gen-art] Genart telechat review of draft-iet… Joel M. Halpern
- Re: [Gen-art] Genart telechat review of draft-iet… Ron Bonica
- Re: [Gen-art] Genart telechat review of draft-iet… Ron Bonica
- Re: [Gen-art] Genart telechat review of draft-iet… Joel M. Halpern
- Re: [Gen-art] Genart telechat review of draft-iet… Stewart Bryant
- Re: [Gen-art] Genart telechat review of draft-iet… Ron Bonica
- Re: [Gen-art] Genart telechat review of draft-iet… Joel M. Halpern
- Re: [Gen-art] Genart telechat review of draft-iet… Stewart Bryant
- Re: [Gen-art] Genart telechat review of draft-iet… Ron Bonica
- Re: [Gen-art] [Int-area] Genart telechat review o… Alissa Cooper