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Re: [pcp] PREFIX64 PCP Option for NAT64: draft-boucadair-pcp-nat64-prefix64-option

<mohamed.boucadair@orange.com> Wed, 12 September 2012 07:28 UTC

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From: mohamed.boucadair@orange.com
To: Dan Wing <dwing@cisco.com>, 'Simon Perreault' <simon.perreault@viagenie.ca>
Date: Wed, 12 Sep 2012 09:28:04 +0200
Thread-Topic: [pcp] PREFIX64 PCP Option for NAT64: draft-boucadair-pcp-nat64-prefix64-option
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Cc: "pcp@ietf.org" <pcp@ietf.org>
Subject: Re: [pcp] PREFIX64 PCP Option for NAT64: draft-boucadair-pcp-nat64-prefix64-option
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Re-,

I updated the draft with these changes:

* Add new flow example showing a TCP session
* clarify the requests can be sent using another order.

FWIW, the diff is available at: http://www.ietf.org/rfcdiff?url2=draft-boucadair-pcp-nat64-prefix64-option-02.

If the WG accepts to work on this draft, I plan to remove all the flow examples from the draft and focus on the specification part.

Cheers
Med 

>-----Message d'origine-----
>De : Dan Wing [mailto:dwing@cisco.com] 
>Envoyé : mardi 11 septembre 2012 19:27
>À : 'Simon Perreault'
>Cc : BOUCADAIR Mohamed OLNC/NAD/TIP; pcp@ietf.org
>Objet : RE: [pcp] PREFIX64 PCP Option for NAT64: 
>draft-boucadair-pcp-nat64-prefix64-option
>
>> -----Original Message-----
>> From: Simon Perreault [mailto:simon.perreault@viagenie.ca]
>> Sent: Tuesday, September 11, 2012 10:13 AM
>> To: Dan Wing
>> Cc: mohamed.boucadair@orange.com; pcp@ietf.org
>> Subject: Re: [pcp] PREFIX64 PCP Option for NAT64: 
>draft-boucadair-pcp-
>> nat64-prefix64-option
>> 
>> Le 2012-09-11 13:08, Dan Wing a écrit :
>> > The message flow for the new PCP Opcode implies there is always
>> > an additional round trip.  There is only an additional round-trip
>> > if MAP (or PEER) is used.  If, on the other hand, the host only
>> > needed to learn the NAT64 prefix (and then it set up a TCP
>> > connection), the number of messages on the network is exactly
>> > the same for the MAP option or the new Opcode, assuming the PCP
>> > client simply leaves the dangling MAP-created mapping until its
>> > Lifetime expires.
>> 
>> Can't the two opcodes be sent simultaneously? No need to wait for one
>> request to finish before starting another one...
>
>Good point.  Learning the PREFIX64 can actually be deferred, as 
>knowing the PREFIX64 is not time critical to sending the SIP INVITE.
>
>-d
>
>
>> Simon
>> --
>> DTN made easy, lean, and smart --> http://postellation.viagenie.ca
>> NAT64/DNS64 open-source        --> http://ecdysis.viagenie.ca
>> STUN/TURN server               --> http://numb.viagenie.ca
>
>

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