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Port State—Displays the current STP state of a port.
o
Disabled—STP is currently disabled on the port. The port forwards traffic
while learning MAC addresses.
o
Blocking—The port is currently blocked, and cannot forward traffic (with
the exception of BPDU data) or learn MAC addresses.
o
Listening—The port is in Listening Mode. The port cannot forward traffic,
and cannot learn MAC addresses.
o
Learning—The port is in Learning Mode. The port cannot forward traffic,
but it can learn new MAC addresses.
o
Forwarding—The port is in Forwarding Mode. The port can forward traffic
and learn new MAC addresses.
•
Designated Bridge ID—Displays the priority and interface of the selected port.
•
Designated Port ID—Displays the priority and interface of the selected port.
•
Designated Cost—Displays the cost of the port participating in the STP topology.
Ports with a lower cost are less likely to be blocked if STP detects loops.
4.
Click
Apply
. The interface settings are written to the Running Configuration file.
RSTP Interfaces
Rapid Spanning Tree Protocol (RSTP) enables a faster STP convergence without creating
forwarding loops.
The RSTP Interface Settings page enables you to configure RSTP per port. Any configuration that
is done on this page is active when the global STP mode is set to RSTP or MSTP.