> On 22. okt. 2015, at 22.23, Brian Trammell <[email protected]> wrote:
> 
> hi Michael,
> 
>> On 22 Oct 2015, at 18:19, Michael Welzl <[email protected]> wrote:
>> 
>> 
>>> On 22. okt. 2015, at 16.14, Aaron Falk <[email protected]> wrote:
>>> 
>>> 
>>>> draft-welzl-taps-transports currently only covers TCP and SCTP. But then: 
>>>> how many other protocols?
>>>> It seems people agree that the protocols covered in 
>>>> draft-welzl-taps-transports should be a subset of the protocols covered in 
>>>> draft-ietf-taps-transports. My question is, then: how to choose the subset?
>>>> 
>>>> It seems obvious to include protocols that are seeing some deployment, 
>>>> i.e. of course UDP, maybe UDP-Lite (?), but also MPTCP…
>>>> However: if that is the only decision ground, we probably wouldn’t include 
>>>> DCCP. Are we then making a significant mistake, missing a lesson to be 
>>>> learned?
>>>> 
>>>> That, to me, is a discussion I’d like to have in Yokohama.
>>> 
>>> +1, and FWIW that's exactly the same starting point I got to on my own.
>>> 
>>> 
>>> Any volunteers to kick off the lead the discussion?
>> 
>> Let me try to roll this some more on the list, because I gave it some 
>> thought:
>> 
>> The goal is to have something buildable. So if we allow protocols that are 
>> hardly deployed into draft-welzl-taps-transports, then this gives us a list 
>> that may include services that one can never implement unless 
>> hardly-deployed protocol X is used, or other protocols are extended to all 
>> of a sudden provide this functionality.
>> 
>> Thus, boring as it may seem, “widely deployed protocols” can be the only 
>> reasonable criterion to allow adding protocols in draft-welzl-taps-transports
> 
> s/widely deployed/widely implemented/g, but yes.

Agreed


> Another thought: draft-gjessing (as it currently is) looks at the minimal set 
> of services. If there are services we believe are useful to support that are 
> not presently widely implemented or deployed, we can certainly add them as 
> optional, no? The only services that could not be handled in such a way would 
> be those that have an impact on the API other than just adding knobs and 
> meters, no?

Sorry, you lose me here - in particular I don’t get the part about “have an 
impact on the API…”. Could you maybe give a toy example?

Cheers,
Michael

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