The following text has been temporarily removed from the NAT Considerations 
section because the Data IP Address message element is not defined in the 
specification. I believe that we should address this in the Working Group last 
call.

		<t>Another issue related to having an AC behind a NAT system 
is CAPWAP
		support for the CAPWAP objective to allow the control and data 
plane
		to be separated. To support this requirement, the CAPWAP
		protocol defines the Data IP Address message element, which
		allows the AC to inform the WTP that the CAPWAP data frames 
are to be
		forwarded to a separate IP Address. This feature MUST be 
disabled when
		an AC is behind a NAT. However, there is no easy way to 
provide some
		default mechanism that satisfies both the data/control 
separation and
		NAT objectives, as they directly conflict with each other. As a
		consequence, user intervention will be required to support such
		networks.</t>