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Re: [Softwires] [BEHAVE] Stateless Deterministic NAPT/DS-Lite

"Poscic, Kristian (Kristian)" <kristian.poscic@alcatel-lucent.com> Thu, 03 November 2011 23:38 UTC

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From: "Poscic, Kristian (Kristian)" <kristian.poscic@alcatel-lucent.com>
To: Reinaldo Penno <rpenno@juniper.net>, "softwires@ietf.org" <softwires@ietf.org>, "behave@ietf.org" <behave@ietf.org>
Date: Thu, 03 Nov 2011 18:38:29 -0500
Thread-Topic: [BEHAVE] Stateless Deterministic NAPT/DS-Lite
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Subject: Re: [Softwires] [BEHAVE] Stateless Deterministic NAPT/DS-Lite
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Just to make sure I understand this. 

Deterministic (statefull) NAT is deterministically translating inside IP to outside IP + port range (take NAT44 case).

Deterministic stateLESS NAT is deterministically translating inside IP + inside_src_port to outside IP + outside_src_port. 
No states are required since the incoming traffic in the downstream direction (outside IP +port) can be deterministically translated to inside IP+port. 
Any incoming traffic from outside will be mapped to something (predictable) on the inside even though there may be no traffic initiated from the inside.

CPE still needs statefull NAT.

Is this correct?
Thanks,
Kris


-----Original Message-----
From: behave-bounces@ietf.org [mailto:behave-bounces@ietf.org] On Behalf Of Reinaldo Penno
Sent: Tuesday, November 01, 2011 4:12 PM
To: softwires@ietf.org; behave@ietf.org
Subject: [BEHAVE] Stateless Deterministic NAPT/DS-Lite

Hello,

we submitted a new draft detailing our implementation of
Stateless-Deterministic NAPT44 and DS-Lite. (SD-NAT)

http://tools.ietf.org/html/draft-penno-softwire-sdnat-01

This is a based on our experience with port bucket/chunk allocation and
deterministic NAPT44. In the draft we provide a comparison with other
stateless/stateful methods floating around.

Thanks,

Reinaldo










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