User Manual

S350 Series 24-Port (PoE+) and 48-Port Gigabit Ethernet Smart Switches
Configure Switching User Manual157
the priority is set to the priority is automatically set to the next lowest priority that is a
multiple of 16. For example, if you set a value between 0 and 15, the priority is set to
0. If you specify a number between 16 and 31, the priority is set to 16. Specify a value
in the range from 0 to 240.
• Port Path Cost. Set the path cost to a new value for the specified port in the selected
MST instance. Specify a value in the range from 0 to 200000000.
10. Click the Apply button.
Your settings are saved.
11. To refresh the page with the latest information about the switch, click the Refresh button.
The following table describes the read-only MST port configuration information displayed on
the Spanning Tree CST Configuration page.
Table 39. MST port status information
Field Description
Operational Port Path Cost Indicates the operational path cost that is based on the link speed of the port if
the configured value for Port Path Cost is zero.
Auto Calculated Port Path
Cost
Indicates 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 zero.
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 Up Time Since Counters
Last Cleared
The time since the counters were last cleared, displayed in days, hours,
minutes, and seconds.
Port Mode The Spanning Tree Protocol administrative mode that is associated with the port
or port channel. The option is Enable or Disable.
Port Forwarding State The current STP state of a port. If enabled, the port state determines what
forwarding action is taken on traffic. The options 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. The port cannot forward traffic nor
can it learn MAC addresses.
• Listening. The port is currently in 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 can be Root Port, Designated Port, Alternate Port, Backup
Port, Master Port, or Disabled Port.
Designated Root The root bridge for the selected MST instance. It is made up using the bridge
priority and the base MAC address of the bridge.