The Control Center will not save ethernet configuration if static route added on Ethernet tab is invalid. In cases of an upgrade from pre-10.0 to 10.0 or later, the resulting error is unexpected.
While the Control Center will not save the ethernet configuration with an invalid static route, versions prior to 10.0 did not detect this error state.
Investigate the configured static routes to determine and remove which item is not valid.
Information on editing the Ethernet configuration can be found in KB HOWTO15599 (www.symantec.com/docs/HOWTO15599).
Messaging Gateway appliance upgraded from pre-10.0 to a 10.0 version or later with a bad static route configuration.