Re: [Lsvr] WGLC for draft-ietf-lsvr-l3dl-ulpc-01 (to end February 19, 2021)
Randy Bush <randy@psg.com> Sat, 06 February 2021 20:37 UTC
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Date: Sat, 06 Feb 2021 12:37:04 -0800
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From: Randy Bush <randy@psg.com>
To: Warren Kumari <warren@kumari.net>
Cc: "Van De Velde, Gunter (Nokia - BE/Antwerp)" <gunter.van_de_velde@nokia.com>, "lsvr@ietf.org" <lsvr@ietf.org>, "lsvr-chairs@ietf.org" <lsvr-chairs@ietf.org>, "draft-ietf-lsvr-l3dl-ulpc@ietf.org" <draft-ietf-lsvr-l3dl-ulpc@ietf.org>
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Subject: Re: [Lsvr] WGLC for draft-ietf-lsvr-l3dl-ulpc-01 (to end February 19, 2021)
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> <no hats> in the weather you're having? > I'm part of the IDR Autoconf design team, and, in my personal opinion, > L3DL/L3DL-ULPC is the most promising solution for our requirements. personally, i would hack it a bit differently for that target. but that's in another galaxy far away. > As we get more deployment experience / fully explore the problem space > we may need a -bis / extensions / similar no extra charge > I personally believe that it makes sense to have a registry for the > Attribute List ("a, possibly null, set of sub-TLVs describing the > configuration attributes of the specific upper layer protocol."), and > that this might need to be a larger code space than a single octet; <pedantry> i presume you mean for attributes, not for the list. given wg support, i do not have a big objection to s/octet/16 bits/ > there are a number of use case/deployment scenarios. Some set of > people will want to configure their own "meanings" for attributes > before deploying devices, but some set of people would like to rely on > some well known (e.g: "I'm at Stage2 in a Clos fabric", "I'm a fabric > egress node", "I'm an edge type node") attributes so that they can do > less manual bootstrapping. as long as i do not have to be in, or at least not listen to, the wg that decides and forever extends the well-known attribute list. > I also think that a larger (16 bit) code space would be better (partly > because of the above) - as a bikeshedding opportunity, a registry with > 1-1024 as RFC Required, 1025-2048 as Spec, 2048-4096 as FCFS, and > 4096-65535 as Private Use / whatever seems good to me. If we stick > with 8 bit, I still think it is worth making the first 32 codepoints > be well-know/registered and people define the meaning for the rest to > mean whatever they want on their network. that is a bit complex for my taste; but it does solve some traditional messes. presuming we're good at guessing the boundaries. and "1025-2048 as Spec" scares me. i hope you are not suggesting we go down the rabbit hole of selecting a set of well-known values in *this* draft. i can hear it now, "my clos uses whitworth bolts." > Whatever the case, I support this - it is an important and useful > document. thanks > Q1: "Otherwise a direct one hop session is used. the BGP session to a > loopback will forward to the peer's address which was marked as > Primary in the L3DL Encapsulation Flags, iff it is in a subnet > which is shared with both BGP speakers." > I'm unclear if the 'iff' is just a typo, or if it short for "if and > only if". you want well-known attributes; i want to use well-known notation :) > Also a nit on 'the BGP session' - this is fragment or needs an upper > case 'T' thx > 1: I think that s/upper layer/upper-layer/g > 2: s/IP layer 3/IP Layer-3/g that could be either way. normally, i would let the rfc editor hack. no matter what i choose, rfced seems to go the other way. > 3: "ULPC Type: An integer denoting the type of the uper layer > protocol" - uper is a typo. whoops > 4: "it might be a simple MD5 key (see [RFC2385]), the name of a key > chain a KARP database" - "chain *in* a KARP" ibid thanks! randy
- [Lsvr] WGLC for draft-ietf-lsvr-l3dl-ulpc-01 (to … Van De Velde, Gunter (Nokia - BE/Antwerp)
- Re: [Lsvr] WGLC for draft-ietf-lsvr-l3dl-ulpc-01 … Warren Kumari
- Re: [Lsvr] WGLC for draft-ietf-lsvr-l3dl-ulpc-01 … Randy Bush
- Re: [Lsvr] WGLC for draft-ietf-lsvr-l3dl-ulpc-01 … Van De Velde, Gunter (Nokia - BE/Antwerp)