Enterasys Vertical Horizon VH-2402S2 Configuration Manual page 103

There are five (5) states that the ports can be in for spanning tree:
•
Blocking: A port in this state does not participate in the transmission
of frames, thus preventing duplication arising through multiple paths
existing in the active topology of the bridged LAN.
•
Listening: A port in this state is preparing to participate in the
transmission of frames. The transmission of frames is temporarily
disabled in order to prevent temporary loops, which may occur in a
bridged LAN during the lifetime of this state as the active topology of
the bridged LAN changes.
•
Learning: A port in this state is preparing to participate in the
transmission of frames.
•
Forwarding: A port in this state is participating in the transmission of
frames.
•
Disabled: A port in this state does not participate in the transmission
of frames or the operation of the spanning tree process.
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