This read-only integer, in hundredths of a second, reports the actual interval this bridge currently uses between sending Configuration BPDUs while it is or is trying to become the root of this PVST instance's tree. An administrator monitors this operational Hello Time to confirm the bridge is using a timer consistent with the rest of the topology, since mismatched hello intervals across a VLAN's bridges can cause premature topology recalculations. For example, if this reads unusually high compared to neighboring switches' equivalent values, the admin checks whether the root bridge for that VLAN was configured with a nonstandard Hello Time.