LevelOne IGP-1271 - Page 406

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 TCN :
The number of (legacy) Topology Change Notification BPDU's received/transmitted
on the port.
 Discarded Unknown :
The number of unknown Spanning Tree BPDU's received (and discarded) on the
port.
 Discarded Illegal :
The number of illegal Spanning Tree BPDU's received (and discarded) on the port.
 Buttons
Auto-refresh: Check this box to refresh the page automatically. Automatic refresh
occurs every 3 seconds.
Clear: Clears the counters for the selected port.
Refresh: Click to refresh the page.