Re: [GROW] WGLC: draft-ietf-grow-route-leak-problem-definition (ends: 8/24/2015 - Aug 24)

"Sriram, Kotikalapudi" <kotikalapudi.sriram@nist.gov> Sun, 01 November 2015 03:07 UTC

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From: "Sriram, Kotikalapudi" <kotikalapudi.sriram@nist.gov>
To: "George, Wes" <wesley.george@twcable.com>
Thread-Topic: [GROW] WGLC: draft-ietf-grow-route-leak-problem-definition (ends: 8/24/2015 - Aug 24)
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Subject: Re: [GROW] WGLC: draft-ietf-grow-route-leak-problem-definition (ends: 8/24/2015 - Aug 24)
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Wes,

Thanks, Wes, for taking another look. 
And thanks for laying out some interesting (and entertaining) alternative names 
that  can to used instead of "U-Turn".
Like we discussed in the hallway this morning, it makes sense to use "Hairpin Turn" 
instead of "U-Turn", especially considering "Hairpin Turn" has been used in the VPN context.

Sriram


________________________________________
From: George, Wes <wesley.george@twcable.com>
Sent: Friday, October 30, 2015 10:01 AM
To: Sriram, Kotikalapudi
Cc: grow-chairs@ietf.org; grow@ietf.org grow@ietf.org; grow-ads@tools.ietf.org
Subject: Re: [GROW] WGLC: draft-ietf-grow-route-leak-problem-definition (ends: 8/24/2015 - Aug 24)

On 10/12/15, 11:40 PM, "Sriram, Kotikalapudi"
<kotikalapudi.sriram@nist.gov> wrote:


Sriram, this is significantly improved. One substantial comment that I
still have with this version:

>>It is also unclear from the text exactly what you mean by U-Turn
>>(it's not going back the way it came, so actually hairpin might be a
>>better term),
>>so a few words to clarify might be useful.
>
>Hairpin seems to have a connotation that the turn is tight/constricted.
>So now I use the phrase “U-shaped turn” instead of “U-turn”.

WG] This may be nitpicking, but I don't think that adding "shaped" is
actually much of an improvement. I was thinking of hairpin from the way
that it is used in VPNs, as in data that enters and leaves the network via
the same edge device, but typically on a different physical or logical
interface (instead of entering on one PE and leaving via another), rather
than the way that it is used on racetracks to describe a near 180 degree
turn.
Here are a few ideas I had of other ways to refer to this:

-  a "detour leak", in that traffic will be detouring through the leaking
ASN
-  "ASN-in-the-middle leak" - similar to MiTM such that invoking the
concept is useful, but it's necessary to disambiguate the two since the
latter has a specific and well-known meaning
-  "parrotting leak" or "game of telephone leak" in that it is repeating
something it learned elsewhere, but introducing a mistake, not unlike the
grade school game of telephone (if you're up for a reference to The
Simpsons, you could call it a "purple monkey dishwasher leak" but that
would likely require too much explanation ;-) )
-  "[accidental | unintentional] transit leak" since the net result of the
leak is that traffic will transit the leaking AS rather than its normal
path


Thanks,

Wes


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