Trying to discover and monitor/manage a pair of Cisco Cat 65xx Virtual Switches. One is an idle standby for the other. They share IP addresses and don't have unique management IP addresses.
All supported Performance Management releases
There is unfortunately no way to reliably and accurately discover devices configured in this way in Performance Management. To do so would require an Enhancement Request that is submitted, approved and implemented to provide this function.
Alternatively if the devices have unique managed IP addresses and host names, they should be able to be individually discovered and polled in Performance Management.