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Switching Features
Spanning Tree
If you modify any global settings, click Apply to save the changes for the current boot session. The changes
take effect immediately.
Port Forwarding
State
Ports can be in one of the following STP states, depending on its configuration and the status of
the STP topology convergence:
• Blocking—The port discards user traffic and receives, but does not send, BPDUs. During the
election process, all ports are in the blocking state. The port is blocked to prevent network loops.
• Listening—The port sends and receives BPDUs and evaluates information to provide a loop-
free topology. This state occurs during network convergence and is the first state in transitioning
to the forwarding state.
• Learning—The port learns the MAC addresses of frames it receives and begins to populate
the MAC address table. This state occurs during network convergence and is the second state
in transitioning to the forwarding state.
• Forwarding—The port sends and receives user traffic.
• Disabled—The port is administratively disabled and is not part of the spanning tree. This is
the default selection.
Field Description
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