Re: [v6ops] Discussion focus: draft-ietf-v6ops-ipv6rtr-reqs

Tim Chown <Tim.Chown@jisc.ac.uk> Tue, 06 February 2018 09:41 UTC

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From: Tim Chown <Tim.Chown@jisc.ac.uk>
To: Bob Hinden <bob.hinden@gmail.com>
CC: "STARK, BARBARA H" <bs7652@att.com>, V6 Ops List <v6ops@ietf.org>
Thread-Topic: [v6ops] Discussion focus: draft-ietf-v6ops-ipv6rtr-reqs
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Subject: Re: [v6ops] Discussion focus: draft-ietf-v6ops-ipv6rtr-reqs
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> On 5 Feb 2018, at 21:52, Bob Hinden <bob.hinden@gmail.com> wrote:
> 
> Barbara,
> 
>> On Feb 5, 2018, at 9:10 AM, STARK, BARBARA H <bs7652@att.com> wrote:
>> 
>>> Thanks for this. It's cogent and to the point.
>>> 
>>> I do have a question. The authors are from LinkedIn and Comcast. How
>>> would you interpret that fact in the context of the facts you point out?
>> 
>> That's for them to say what their motivation is. But Comcast and LinkedIn are both known to be at the forefront of IPv6 deployment. I wouldn't classify LinkedIn as an ISP of any sort or a core/transit network provider or an IXC. If LinkedIn or Comcast thinks there is a need for requirements for data center network routers, that would be interesting to know. Most major data center operators I know have gone to using SDN (with open source router software on commodity hardware). I don't recall having heard Comcast say they need a router requirements document to help with their access/regional network IPv6 deployment (which seems to be doing quite well). I don't know about any internal corporate networks they may have -- which I would classify as "enterprise networks".
>> 
>> Personally, I haven't heard any of the people working on any of my employer's access/regional/core networks asking for a new IETF router requirements document (the IPv6 metrics for wireline and wireless access are looking pretty good with non-IPv6 traffic due to hosts/wireless UEs/retail CE routers and not the network routers, and no issues in the core; router requirements would have no impact on use of 6rd in legacy DSL access). I have not yet noticed IPv6 in the corporate (enterprise) network that I attach to for work. I've also heard from some people who work with enterprise customers that adoption among those customers is a painfully slow crawl.
> 
> I agree with what you have written.  It’s not clear to me what the need is here.  Regarding enterprise deployment, I would be surprised if the reason for slow IPv6 adoption has anything to do with the IETF writing a document describing what an IPv6 enterprise router should implement.  If someone has evidence to show it is needed, I would like to see it too.

I certainly hear questions from campus network admins about IPv6 requirements for tenders. There are documents like RIPE-554 which are helpful in that regard (though it needs an update), but being able to point at an RFC has some value, and any update of 554 would likely draw on the consensus expressed therein, along with 6434-bis.

I really like the writing style of draft-ietf-v6ops-ipv6rtr-reqs; there's a lot of very good and very useful discussion and advice in there aside from specific MUSTs and SHOULDs.

Tim

> Thanks,
> Bob
> 
> 
>> 
>> Clearly, there is a population with a need. If we focus on helping that population, it might be possible to drive results.
>> Barbara
>> 
>>>> On Feb 5, 2018, at 7:34 AM, STARK, BARBARA H <bs7652@att.com> wrote:
>>>> 
>>>>>> The primary focus is routers for enterprise or carrier use, however
>>>>>> most of the features also have broad applicability to all routers.
>>>> 
>>>> I see a real need for recommendations for enterprise routers. I also believe
>>> that any attempts to broaden the scope beyond that will both slow down
>>> producing such recommendations and force the recommendations to be
>>> watered down to the point whether they are significantly less useful to
>>> enterprise networks.
>>>> Here is why I think most other router types either don't need or will ignore
>>> these recommendations:
>>>> - CE routers are covered by RFC 7084
>>>> - telco ISPs aren't asking for this (for their own ISP networks) and
>>>> tend to use BBF documents; any who are waiting until IETF produces
>>>> router requirements for them need to reconsider their strategy
>>>> - cable ISPs aren't asking for this (for their own ISP networks) and
>>>> tend to use CableLabs docs; any who are waiting until IETF produces
>>>> router requirements for them need to reconsider their strategy
>>>> - wireless ISPs aren't asking for this and tend to use 3GPP docs; any
>>>> who are waiting until IETF produces router requirements for them need
>>>> to reconsider their strategy
>>>> - transit/core network providers aren't asking for this and have
>>>> already got IPv6 running (and if they haven't, there's no excuse,
>>>> because the equipment is there); they also don't tend to do address
>>>> assignment (no hosts on those networks) so requirements for DHCPv6 and
>>>> SLAAC aren't needed; a lot of this equipment is done with SDN now;
>>>> this is also true of a lot of the "regional network" part of ISP
>>>> networks
>>>> - IXCs don't tend to do address assignment and seem to have IPv6 in
>>>> place; any that don't have IPv6 -- it's not for lack of requirements;
>>>> a lot of them have gone to SDN
>>>> 
>>>> As for SDN: If you think an open source project doing SDN code is missing
>>> some IPv6 functionality, it might be easier to contribute the code, rather than
>>> write an RFC and see if some random person says "OMG, the IETF is saying
>>> do this; no-one else is writing this code so I guess I better do it".
>>>> 
>>>> We need to get enterprises transitioning. Whatever IETF can do to help
>>> that specific audience would be appreciated.
>>>> Barbara
>>>> 
>>>> _______________________________________________
>>>> v6ops mailing list
>>>> v6ops@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/v6ops
>> 
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