Re: [core] Chair's review of draft-ietf-core-hop-limit-02.txt
<mohamed.boucadair@orange.com> Mon, 25 February 2019 07:22 UTC
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From: mohamed.boucadair@orange.com
To: Carsten Bormann <cabo@tzi.org>, Jim Schaad <ietf@augustcellars.com>
CC: core <core@ietf.org>, "draft-ietf-core-hop-limit@ietf.org" <draft-ietf-core-hop-limit@ietf.org>
Thread-Topic: [core] Chair's review of draft-ietf-core-hop-limit-02.txt
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Date: Mon, 25 Feb 2019 07:22:23 +0000
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Subject: Re: [core] Chair's review of draft-ietf-core-hop-limit-02.txt
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Hi Carsten, Jim, all, I do agree with Jim that it is early to have a “SHOULD deploy” level. At least that is not the intent of the text which triggered the comment. The intent is to allow for a configurable behavior of proxies which support the option. That wording can be updated to avoid misinterpretation, e.g.,: OLD: If a CoAP proxy receives a request which does not include a Hop-Limit option, it SHOULD insert a Hop-Limit option when relaying the request to a next hop (absent explicit policy/configuration otherwise). NEW: A CoAP proxy MAY be instructed, using a configuration parameter, to insert a Hop-Limit option when relaying a request which do not include the Hop-Limit option. Cheers, Med > -----Message d'origine----- > De : Carsten Bormann [mailto:cabo@tzi.org] > Envoyé : samedi 23 février 2019 06:58 > À : Jim Schaad > Cc : BOUCADAIR Mohamed TGI/OLN; core; draft-ietf-core-hop-limit@ietf.org > Objet : Re: [core] Chair's review of draft-ietf-core-hop-limit-02.txt > > On Feb 22, 2019, at 22:47, Jim Schaad <ietf@augustcellars.com> wrote: > > > > My gut feeling is that the answer should be yes it should become a > recommended option for all CoAP proxies. I am not sure that this is the time > for that to happen. I think that in the next couple of years there may be a > larger need to develop some BCPs for proxies and that would be the time to > make the recommendation. > > Right. So the specific question for the WG is: > > Are we ready to strongly recommend (on a “SHOULD deploy” level) hop-limit as > our proxy loop mitigation technique now? > > Or should we wait with such a recommendation until we have had a broader view > at proxy requirements? (E.g., then, MAYBE we might want to go for Via-like > loop prevention instead — very big MAYBE, as Via is expensive with IPv6.) > > I don’t have a strong opinion either way and therefore would like some more > feedback from the WG. > > In any case, the place in DOTS where it says how CoAP is used for DOTS should > also say “please do deploy hop-limit where proxies are used” in the strength > that the DOTS people are comfortable with. > > While the hop-limit draft is not heavily associated with DOTS, maybe it would > be useful to add some “not just for DOTS” language as well (after all, that > was the point of splitting it out). > > Grüße, Carsten
- [core] Chair's review of draft-ietf-core-hop-limi… Carsten Bormann
- Re: [core] Chair's review of draft-ietf-core-hop-… mohamed.boucadair
- Re: [core] Chair's review of draft-ietf-core-hop-… Jim Schaad
- Re: [core] Chair's review of draft-ietf-core-hop-… Carsten Bormann
- Re: [core] Chair's review of draft-ietf-core-hop-… mohamed.boucadair
- Re: [core] Chair's review of draft-ietf-core-hop-… Klaus Hartke
- Re: [core] Chair's review of draft-ietf-core-hop-… mohamed.boucadair