When upgrading to 2012.03.19 from releases prior to 2011.08.06, the management interface configuration fails, and the interface remains unconfigured.

http://bugs.openflowhub.org/browse/INDIGO-134 tracks this issue.

A workaround is to:
  1. Prior to upgrading: in sysenv, replace switch_ip or switchip with ip_addr.
  2. Upgrade to 2012.03.19.
  3. After upgrading, use the switch cli to change the configuration; e.g. run the command config set log_level warn. This will cause sysenv and /etc/ifcfg-<management_interface> to be regenerated.
  4. Reboot.
  5. After reboot, the management interface should now be properly reconfigured.