This read-only counter, though its description is empty, tracks by its name how many times this switch's ring role-such as between Redundancy Manager and Non-RM-has changed since the counter was last reset. An admin watches for this counter climbing quickly as a sign of instability in the ring's RM election, which normally should stay stable for long periods. For example, seeing this counter jump from 2 to 40 overnight signals repeated role flapping that warrants investigating a flaky ring cable or intermittent power issue on one of the ring's switches.