Configuring Switching
167
S3300 Smart Managed Pro Switch
Port Mode Spanning Tree Protocol Administrative Mode associated with the port or port
channel. Possible values are Enable or Disable.
Port Forwarding State Indicates the current STP state of a port. If enabled, the port state determines
what forwarding action is taken on traffic. Possible port states are:
• Disabled. STP is currently disabled on the port. The port forwards traffic
while learning MAC addresses.
• Blocking. The port is currently blocked and cannot be used to forward traffic
or learn MAC addresses.
• Listening. The port is currently in the listening mode. The port cannot
forward traffic nor can it learn MAC addresses.
• Learning. The port is currently in the learning mode. The port cannot
forward traffic, however, it can learn new MAC addresses.
• Forwarding. The port is currently in the forwarding mode. The port can
forward traffic and learn new MAC addresses
Port Role Each MST Bridge Port that is enabled is assigned a Port Role for each spanning
tree. The port role will be one of the following values: Root Port, Designated
Port, Alternate Port, Backup Port, Master Port, or Disabled Port.
Designated Root Root Bridge for the selected MST instance. It is made up using the bridge
priority and the base MAC address of the bridge.
Designated Cost Displays cost of the port participating in the STP topology. Ports with a lower
cost are less likely to be blocked if STP detects loops.
Designated Bridge Bridge Identifier of the bridge with the Designated Port. It is made up using the
bridge priority and the base MAC address of the bridge.
Designated Port Port Identifier on the Designated Bridge that offers the lowest cost to the LAN. It
is made up from the port priority and the interface number of the port.
Table 56. MST port status information (continued)
Field Description
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