Re: [Int-dir] INTDIR Review of draft-ietf-nvo3-bfd-geneve-12
"Eric Vyncke (evyncke)" <evyncke@cisco.com> Fri, 25 August 2023 08:28 UTC
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From: "Eric Vyncke (evyncke)" <evyncke@cisco.com>
To: Donald Eastlake <d3e3e3@gmail.com>, "xiao.min2@zte.com.cn" <xiao.min2@zte.com.cn>
CC: "int-ads@ietf.org" <int-ads@ietf.org>, "draft-ietf-nvo3-bfd-geneve.all@ietf.org" <draft-ietf-nvo3-bfd-geneve.all@ietf.org>, "int-dir@ietf.org" <int-dir@ietf.org>, "nvo3-chairs@ietf.org" <nvo3-chairs@ietf.org>
Thread-Topic: INTDIR Review of draft-ietf-nvo3-bfd-geneve-12
Thread-Index: AQHZz1K62/0rJBfBQkuzObJJvdz2Jq/tZjwAgACqdICABuaNgIAF5/sA
Date: Fri, 25 Aug 2023 08:28:49 +0000
Message-ID: <58817E04-10C7-4DC1-9588-977C1C442DE2@cisco.com>
References: <CAF4+nEHU5xOAMoydJkRX1w=D+oar2pLVVBxC=en-UZ5mW-H_iQ@mail.gmail.com> <202308171454291756536@zte.com.cn> <CAF4+nEEc2rDkB+f4vA5jpOwAjdWT_hzp+xjUQW-NqEVOHhrX2g@mail.gmail.com>
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Subject: Re: [Int-dir] INTDIR Review of draft-ietf-nvo3-bfd-geneve-12
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Thank you, Donald, for the review and the follow-up with the authors. The I-D is now improved. Regards, -éric On 21/08/2023, 18:17, "Donald Eastlake" <d3e3e3@gmail.com <mailto:d3e3e3@gmail.com>> wrote: Hi Xiao Min, OK, with the further tweaks below I considera all my comments to have been resolved. Thanks, Donald =============================== Donald E. Eastlake 3rd +1-508-333-2270 (cell) 2386 Panoramic Circle, Apopka, FL 32703 USA d3e3e3@gmail.com <mailto:d3e3e3@gmail.com> On Thu, Aug 17, 2023 at 2:54 AM <xiao.min2@zte.com.cn <mailto:xiao.min2@zte.com.cn>> wrote: > > Hi Donald, > > > Thank you for the response. > Please see inline my comments tagged with [XM-2]. > > CC'd to nvo3@ietf.org <mailto:nvo3@ietf.org>. > > Original > From: DonaldEastlake <d3e3e3@gmail.com <mailto:d3e3e3@gmail.com>> > To: 肖敏10093570; > Cc: int-ads@ietf.org <mailto:int-ads@ietf.org> <int-ads@ietf.org <mailto:int-ads@ietf.org>>;draft-ietf-nvo3-bfd-geneve.all@ietf.org <mailto:draft-ietf-nvo3-bfd-geneve.all@ietf.org> <draft-ietf-nvo3-bfd-geneve.all@ietf.org <mailto:draft-ietf-nvo3-bfd-geneve.all@ietf.org>>;int-dir@ietf.org <mailto:int-dir@ietf.org> <int-dir@ietf.org <mailto:int-dir@ietf.org>>;nvo3-chairs@ietf.org <mailto:nvo3-chairs@ietf.org> <nvo3-chairs@ietf.org <mailto:nvo3-chairs@ietf.org>>; > Date: 2023年08月17日 04:44 > Subject: Re: INTDIR Review of draft-ietf-nvo3-bfd-geneve-12 > Xiao Min, > > On Tue, Aug 15, 2023 at 4:30 AM <xiao.min2@zte.com.cn <mailto:xiao.min2@zte.com.cn>> wrote: > > > > Hi Donald, > > > > Thanks for your review and thoughtful comments. > > Please see inline. > > > > Original > > From: DonaldEastlake <d3e3e3@gmail.com <mailto:d3e3e3@gmail.com>> > > To: int-ads@ietf.org <mailto:int-ads@ietf.org> <int-ads@ietf.org <mailto:int-ads@ietf.org>>;draft-ietf-nvo3-bfd-geneve.all@ietf.org <mailto:draft-ietf-nvo3-bfd-geneve.all@ietf.org> <draft-ietf-nvo3-bfd-geneve.all@ietf.org <mailto:draft-ietf-nvo3-bfd-geneve.all@ietf.org>>; > > Cc: int-dir@ietf.org <mailto:int-dir@ietf.org> <int-dir@ietf.org <mailto:int-dir@ietf.org>>;nvo3-chairs@ietf.org <mailto:nvo3-chairs@ietf.org> <nvo3-chairs@ietf.org <mailto:nvo3-chairs@ietf.org>>; > > Date: 2023年08月05日 19:23 > > Subject: INTDIR Review of draft-ietf-nvo3-bfd-geneve-12 > > I am an assigned INT directorate reviewer for > > <draft-ietf-nvo3-geneve-12.txt>. These comments were written primarily > > for the benefit of the Internet Area Directors. Document editors and > > shepherd(s) should treat these comments just like they would treat > > comments from any other IETF contributors and resolve them along with > > any other Last Call comments that have been received. For more details > > on the INT Directorate, see > > https://datatracker.ietf.org/group/intdir/about/ <https://datatracker.ietf.org/group/intdir/about/> > > <https://datatracker.ietf.org/group/intdir/about/> <https://datatracker.ietf.org/group/intdir/about/>>. > > > > Based on my review, if I was on the IESG I would ballot this document > > as DISCUSS. I have the following DISCUSS/ABSTAIN level issues: > > > > - I do not understand the second half of the last paragraph of Section > > 1. It says: "BFD for Geneve MUST be used within a TMCE unless BFD is > > congestion controlled." But then seems to specify that it be > > congestion controlled inside a TMCE. Would it be simpler to say that > > BFD for Geneve must always be congestion controlled, if that is what > > is intended? > > [XM]>>> The last paragraph of Section 1 was introduced to address comments from Magnus Westerlund in his Tsvart last call review [1]. > > > > In Magnus's comments, it says > > > > "So I think there are two paths forward. Either restrict the applicability of > > this usage to paths where it is known to have provisioned capacity for the BFD, > > as noted as required in RFC 5881 applicability statement. The alternative is to > > extend BFD to actually have a real congestion control." > > > > I agree with Magnus that "have provisioned capacity for the BFD" (as required in RFC 5881) and "a real congestion control" are two different things. > > To avoid confusion, I propose to change the text as below. > > > > OLD > > > > BFD for Geneve MUST > > be used within a TMCE unless BFD is congestion controlled. An > > operator of a TMCE deploying BFD for Geneve is required to provision > > the rates at which BFD is transmitted to avoid congestion and false > > failure detection. > > > > NEW > > > > BFD for Geneve MUST > > be used within a TMCE unless BFD is really congestion controlled. As an alternative to a real congestion control, an > > operator of a TMCE deploying BFD for Geneve is required to provision > > the rates at which BFD is transmitted to avoid congestion and false > > failure detection. > > > > [1] https://mailarchive.ietf.org/arch/msg/nvo3/Gps8423YoowFB0lN2UudpLeGxHk/ <https://mailarchive.ietf.org/arch/msg/nvo3/Gps8423YoowFB0lN2UudpLeGxHk/> > > OK. > > > - The wording in Section 4.1 first paragraph seems confusing and > > > > incomplete. (I believe this has been covered in other reviews.) > > [XM]>>> Yes, this has been covered in John's review. > > > > > > - In the first paragraph of Section 6: How can it be that both "Geneve > > provides security" and "Geneve does not have any inherent security > > mechanisms" ? > > [XM]>>> Propose to change the text as below. > > > > OLD > > > > Geneve provides security between the peers and subject to the issue of overload described below. > > > > NEW > > > > Geneve (through IPsec, DTLS, or other means) provides security between the peers and subject to the issue of overload described below. > > I think you are talking about wrapping Geneve in IPSEC / DTLS / etc. I > don't see how this is Geneve providing security. It's IPSEC / DTLS / > etc. providing security for whatever their payload is including where > that payload is something wrapped in Geneve. > > [XM-2]>>> You're right. Let me try again. > > OLD > Geneve provides security between the peers and subject to the issue of overload described below. > NEW > The IP underlay network and/or the Geneve option can provide security between the peers, which are subject to the issue of overload described below. > > > > The following are other issues I found with this document that SHOULD > > > be corrected before publication: > > > > - In section 4, the Inner Ethernet Header MAC addresses are in the > > wrong order. The Destination MAC comes first, followed by the Source > > MAC in an Ethernet header, the opposite of IP. > > [XM]>>> OK. Propose to change the text as below. > > > > OLD > > > > Inner Ethernet Header:¶ > > Source MAC: MAC address of a VAP of the originating NVE.¶ > > Destination MAC: MAC address of a VAP of the terminating NVE. > > > > NEW > > > > Inner Ethernet Header:¶ > > Destination MAC: MAC address of a VAP of the terminating NVE. > > Source MAC: MAC address of a VAP of the originating NVE.¶ > > OK. > > > The following are minor issues (typos, misspelling, minor text > > improvements) with the document: > > > > - Given the prominence of "tunnels" in the one sentence abstract, I > > think it would be good to use that word in the first paragraph of the > > Introduction. Possibly: "... an overlay network of tunnels by > > decoupling ..." > > [XM]>>> OK. Will make the change as you proposed. > > > > > > - Section 1, last line of first paragraph on page 3: payload -> payloads > > [XM]>>> I suspect you mean page 2, right? > > I'm pretty sure it's page 3: > OLD > Geneve and VXLAN [RFC7348] is that Geneve supports multi-protocol > payload and variable length options. > NEW > Geneve and VXLAN [RFC7348] is that Geneve supports multi-protocol > payloads and variable length options. > [XM-2]>>> OK, I see. Will make this change. > > > > - Section 4.1, first paragraph: "Protocol Type" -> "Ethertype" > > > [XM]>>> As defined in Geneve Header, this field is called "Protocol Type", do I miss something? > > Probably better to maintain consistency. > [XM-2]>>> In both Section 4.1 and Section 5.1, "Protocol Type" is consistently used, so propose to remain it as is. > > > Cheers, > > Xiao Min > > > > - Section 5, last line: that -> when > > > [XM]>>> Considering "Management VNI" is outside the scope of this document, I propose to remove the last sentence, and change SHOULD to MUST. > > > > OLD > > Virtual Network Identifier (VNI) field SHOULD be set to the VNI > > number that the originating VAP is mapped to. One exception is > > that the Management VNI is used. > > > > NEW > > Virtual Network Identifier (VNI) field MUST be set to the VNI > > number that the originating VAP is mapped to. > > > > Note that the same change applies to the last paragraph of Section 4. > > OK. > > > - Section 6, "not low" -> "high" > > [XM]>>> OK. > > Thanks, > Donald > =============================== > Donald E. Eastlake 3rd +1-508-333-2270 (cell) > 2386 Panoramic Circle, Apopka, FL 32703 USA > d3e3e3@gmail.com <mailto:d3e3e3@gmail.com> > > > Best Regards, > > Xiao Min > >
- [Int-dir] INTDIR Review of draft-ietf-nvo3-bfd-ge… Donald Eastlake
- Re: [Int-dir] INTDIR Review of draft-ietf-nvo3-bf… Eric Vyncke (evyncke)
- Re: [Int-dir] INTDIR Review of draft-ietf-nvo3-bf… xiao.min2
- Re: [Int-dir] INTDIR Review of draft-ietf-nvo3-bf… xiao.min2
- Re: [Int-dir] INTDIR Review of draft-ietf-nvo3-bf… Donald Eastlake
- Re: [Int-dir] INTDIR Review of draft-ietf-nvo3-bf… xiao.min2
- Re: [Int-dir] INTDIR Review of draft-ietf-nvo3-bf… Donald Eastlake
- Re: [Int-dir] [nvo3] INTDIR Review of draft-ietf-… xiao.min2
- Re: [Int-dir] INTDIR Review of draft-ietf-nvo3-bf… Eric Vyncke (evyncke)