There is an OOB management port on the S3500 and S2500 Mobility Access Switches, however the 7200 series controllers do not have a traditional OOB management port. We use the 10G uplinks for data and use one of the gigabit ports as an OOB management port. We just picked a random vlan (999) to use and gave the IP interface an address in our layer 2 dark network.
Tim