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Re: [shara] Comments on the A+P issues (D. Thaler presentation)

<mohamed.boucadair@orange-ftgroup.com> Thu, 12 November 2009 13:47 UTC

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From: <mohamed.boucadair@orange-ftgroup.com>
To: Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp>
Date: Thu, 12 Nov 2009 14:43:02 +0100
Thread-Topic: [shara] Comments on the A+P issues (D. Thaler presentation)
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Subject: Re: [shara] Comments on the A+P issues (D. Thaler presentation)
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Dear Masataka,

Please see inline.

Cheers
Med

-----Message d'origine-----
De : Masataka Ohta [mailto:mohta@necom830.hpcl.titech.ac.jp] 
Envoyé : jeudi 12 novembre 2009 14:17
À : BOUCADAIR Mohamed NCPI/NAD/TIP
Cc : shara@ietf.org
Objet : Re: [shara] Comments on the A+P issues (D. Thaler presentation)

mohamed.boucadair@orange-ftgroup.com wrote:

> I have just read the slides your presented during the shara BoF

Just ignore them.

> 2/ Below some comments:

It is a waste of time to give comments on such a poor presentation.

> The unsolvable issue
> (with the current ICMP version) is that you can not issue an ICMP 
> request a device with shared address towards another device with a 
> shared address.

Wrong.

Just treat identifier and sequence numbers of ICMP echo request as source and destination port numbers and of ICMP echo reply as destination and source port numbers, respectively.

Med: This is why I mentioned "with the current ICMP version" since changes may be required if we want to solve the exchange of ICMP messages when both the source and destination are located behind NAT devices. 

ICMP echo with end to end NAT is just working so.

Med: Even when you have two NATs/PRR in the path (this was the scenario I'm referring to)?
	
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