PLANET IGS-10020HPT User Manual
Page 171
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User’s Manual of IGS-10020HPT
171
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.
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