Currently Being ModeratedNov 16, 2012 10:51 PM (in response to ross_the_boss)
Which exact model of Cisco router do you have? Infrastructure mode, as opposed to Ad-Hoc, refers to the most common form of a network configuration used today. One that relies on one or many access points.
If this is what you are referring to, the AirPort Extreme by default, operates in the Infrastructure mode.
What is your goal using the Extreme with your Cisco router? Extend its wireless network for example?