MVID 25h - Report New Active Monitor
Destination Address: C0-00-00-00-00-10 (LAN Manager)
Destination Class: 4 (Configuration Report Server)
Source Class: 0 (ring station)
Subvectors: SVID 0Bh - Physical Drop Number
SVID 22h - Product Instance ID
This frame is sent by the active monitor adapter, after winning contention, to report to the network manager that the adapter is now the new active monitor.