ctFnbPortConnectionChanges is a read-only counter of how many times any port within this MIM's management domain has had its inter-RIC channel (port) assignment changed. Unlike ctFnbPortChanges, which tracks bus-connection changes, this counter specifically tracks channel-assignment changes, letting an admin distinguish reconfiguration churn from physical connection flapping. For example, a sudden increase in ctFnbPortConnectionChanges right after a maintenance window would confirm that channel assignments were indeed reshuffled across ports in that MIM's domain, matching the change record.