Configure Switching
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ProSAFE 10-Gigabit Smart Managed Switch XS728T and XS748T User Manual
• To configure all interfaces with the same settings, select the check box in the heading
row.
9. Configure the MST values for the selected interfaces:
• Port Priority. Specify the priority for the interfaces. The port priority is set in multiples
of 16. The range is 0–240. The default setting is 128.
• Port Path Cost. Specify the path cost for the interfaces. The range is 0–200000000.
The default setting is 2000000. If you enter 0, the switch recalculates the path cost.
10. Click the Apply button.
The updated configuration is sent to the switch. Configuration changes take effect
immediately.
11. To restart the STP migration process (that is, force renegotiation with neighboring switches
for the selected interfaces), click the Activate Protocol Migration button.
The following table describes the read-only MST port configuration information displayed on
the Spanning Tree CST Configuration page.
Table 30. MST port status information
Field Description
Auto Calculated Port Path
Cost
Displays whether the path cost is automatically calculated (Enabled) or not
(Disabled). Path cost is calculated based on the link speed of the port if the
configured value for Port Path Cost is 0.
Port ID The port identifier for the specified port within the selected MST instance. It is
made up from the port priority and the interface number of the port.
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 as follows:
• 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 is one of the following: Root, Designated, Alternate, Backup,
Master, 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.
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