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Re: [shara] Summary and outcomes from aplusp BoF at IETF 76

Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp> Mon, 07 December 2009 12:58 UTC

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Date: Mon, 07 Dec 2009 21:57:15 +0900
From: Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp>
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To: Ralph Droms <rdroms@cisco.com>
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Cc: Softwire Chairs <softwire-chairs@tools.ietf.org>, shara@ietf.org, IESG IESG <iesg@ietf.org>
Subject: Re: [shara] Summary and outcomes from aplusp BoF at IETF 76
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Ralph Droms wrote:

> * there is a need to provide inbound connections to
>   subscriber-provided services, and

That's trivially easy with end to end NAT. Moreover, A+P can be
improved to be A+P--, which is fully transparent end to end, by
removing legacy NAT functionality of CPE.

For further port sharing, CPE of A+P-- may also act as a gateway
of end to end NAT.

> * a+p has too many side effects, not all of which are known at this
>   point, to be a useful mechanism to meet that need.

The consensus on this mailing list, so far, is that Dave Thaler
speculated too many side effects none of which are known to exist. 

If you disagree, please describe a side effect or two in reasonable
detail.

						Masataka Ohta

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