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IP Address Type Options Attribute
Specify whether a routable (public) or non-routable (private) IP address should be assigned to a PWLAN client.
Used by Access Network (in Access-Request) to indicate what IP address type options (private vs. public) are supported by an Access Network
Used by a Home Network (in Access-Accept) to specify what type of IP address (private, public) must be assigned to the PWLAN subscriber.

PPT Version