A primary server and a backup server that both run a RADIUS client in a cold start configuration share a single IP address that includes a limited number of message identifiers. The electric rotating machine 2 for vehicle acting as a moter or a generator includes brackets 7 and 15 on both front side and rear side of a stator. The one or more data sequences may be presented to a memory during a test mode. Selective logic gates can also be enabled or disabled by configuring them effectively as memory devices.