Re: [Taps] Fwd: New Version Notification for draft-grinnemo-taps-he-02.txt

Hi, all,

Some observations:

- HE-trans MUST NOT be used to try different combinations of options
within a given transport

- I'm wondering about the potential for problems when ports are reused
between different attempts, e.g., IPv6-TCP then IPv4-TCP

- the document works only for connection-orient transports that treat
failed connections as "no information"

    if a connection fails for other reasons, the origin might receive an
ICMP message that prohibits further attempts, either to that transport,
port, or address

    if a connection attempt is rejected but used as information, you
could end up with confusing results (e.g., as a covert channel)

    in that case, you're not doing HE; IMO, HE requires that there be no
impact to failed attempts

Joe

On 3/14/2017 2:37 AM, Anna Brunstrom wrote:
>
> Hi all,
>
> The draft below on happy eyeballs was submitted last night. It is on
> the agenda for Chicago, but we are happy to hear any comments you may
> have also before then.
>
> Cheers,
> Anna
>
> -------- Forwarded Message --------
> Subject: 	New Version Notification for draft-grinnemo-taps-he-02.txt
> Date: 	Mon, 13 Mar 2017 11:18:59 -0700
> From: 	internet-drafts@ietf.org
> To: 	Zdravko Bozakov <Zdravko.Bozakov@dell.com>, Zdravko Bozakov
> <zdravko.bozakov@dell.com>, Anna Brunstrom <anna.brunstrom@kau.se>,
> Per Hurtig <per.hurtig@kau.se>, Karl-Johan Grinnemo
> <karl-johan.grinnemo@kau.se>, Naeem Khademi <naeemk@ifi.uio.no>
>
>
>
> A new version of I-D, draft-grinnemo-taps-he-02.txt
> has been successfully submitted by Karl-Johan Grinnemo and posted to the
> IETF repository.
>
> Name:		draft-grinnemo-taps-he
> Revision:	02
> Title:		Happy Eyeballs for Transport Selection
> Document date:	2017-03-13
> Group:		Individual Submission
> Pages:		10
> URL:            https://www.ietf.org/internet-drafts/draft-grinnemo-taps-he-02.txt
> Status:         https://datatracker.ietf.org/doc/draft-grinnemo-taps-he/
> Htmlized:       https://tools.ietf.org/html/draft-grinnemo-taps-he-02
> Diff:           https://www.ietf.org/rfcdiff?url2=draft-grinnemo-taps-he-02
>
> Abstract:
>    Ideally, network applications should be able to select an appropriate
>    transport solution from among available transport solutions.
>    However, at present, there is no agreed-upon way to do this.  In
>    fact, there is not even an agreed-upon way for a source end host to
>    determine if there is support for a particular transport along a
>    network path.  This draft addresses these issues, by proposing a
>    Happy Eyeballs framework.  The proposed Happy Eyeballs framework
>    enables the selection of a transport solution that according to
>    application requirements, pre-set policies, and estimated network
>    conditions is the most appropriate one.  Additionally, the proposed
>    framework makes it possible for an application to find out whether a
>    particular transport is supported along a network connection towards
>    a specific destination or not.
>
>                                                                                   
>
>
> Please note that it may take a couple of minutes from the time of submission
> until the htmlized version and diff are available at tools.ietf.org.
>
> The IETF Secretariat
>
>
>
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