User Manual

24-Port and 48-Port Gigabit Ethernet PoE+ Smart Switches with 4 SFP Ports
Configure Switching User Manual208
• To configure all interfaces with the same settings, select the check box in the heading
row.
10. Configure the MST values for the selected interfaces:
• Port Priority.
The priority for a particular port within the selected MST instance. The
port priority is set in multiples of 16. If you specify a value that is not a multiple of 16,
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 of 0–240.
• 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 of 0–200000000.
11. Click the Apply button.
Your settings are saved.
The following table describes the read-only MST port configuration information displayed on
the Spanning
Tree CST Configuration page.
Table 41. MST port status information
Field Description
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 possible values are Enable and Disable.
Port Forwarding State Indicates the current STP state of a port. If enabled, the port state determines
what forwarding action is taken on traf
fic. Possible port states are as follows:
• Manual Forwarding. STP is currently disabled on the port.
The port
forwards traffic while learning MAC addresses.
• Discarding. The port is currently blocked. 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 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.