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Re: [Stackevo-discuss] Fwd: New Version Notification for draft-welzl-irtf-iccrg-tcp-in-udp-00.txt

Joe Touch <touch@isi.edu> Thu, 24 March 2016 17:35 UTC

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To: Tom Herbert <tom@herbertland.com>
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From: Joe Touch <touch@isi.edu>
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Date: Thu, 24 Mar 2016 10:34:49 -0700
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Cc: stackevo-discuss@iab.org, Michael Welzl <michawe@ifi.uio.no>, touch@isi.edu
Subject: Re: [Stackevo-discuss] Fwd: New Version Notification for draft-welzl-irtf-iccrg-tcp-in-udp-00.txt
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On 3/23/2016 5:51 PM, Tom Herbert wrote:
> On Wed, Mar 23, 2016 at 4:57 PM, Joe Touch <touch@isi.edu> wrote:
>>
>>
>> On 3/23/2016 4:51 PM, Tom Herbert wrote:
>> ...
>>> You should be able to accomplish the "same path" behavior by setting
>>> IPv6 flow label same value for different connections between same IP
>>> pair. This avoids all the unpleasantness that accompanies
>>> encapsulation.
>>
>> You would need to do IP encapsulation AND use a flow label on that
>> encaps. Otherwise, you'd have different IP addresses with the same flow
>> label - which aren't expected to do anything useful.
>>
> Oh, I guess I'm missing something.

Sorry - it was I who jumped over the "between the same IP pair" above.
If that's assumed, then setting the flow label is sufficient.

> If the (destination) addresses are
> different how does encapsulating in UDP allow packets for these
> connections to take the same path?

It wouldn't - that's what I had misread. I was just noting that merely
setting flow labels the same isn't enough - the IP addresses have to match.

Joe

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