PLANET WGS3-2820 - Manual (Page 141)

User’s Manual of WGS3-2820/WGS3-5220
141
。 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 CST. It is made up using the bridge priority and the base MAC address of
the bridge.
。 Designated Cost - Path Cost offered to the LAN by the Designated Port.
。 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.
。 Topology Change Acknowledge - Identifies whether the next BPDU to be transmitted for this port would have the
topology change acknowledgement flag set. It is either "True" or "False".
。 Edge port - indicates whether the port is enabled as an edge port. It takes the value "Enabled" or "Disabled".
。 Point-to-point MAC - Derived value of the point-to-point status.
。 CST Regional Root - Bridge Identifier of the CST Regional Root. It is made up using the bridge priority and the
base MAC address of the bridge.
。 CST Path Cost - Path Cost to the CST Regional Root.
Command Buttons
。 Submit - Applies the new configuration and causes the changes to take effect. These changes will not be retained
across a power cycle unless a save configuration is performed.
。 Force - Clicking this button will force the port to send out 802.1w or 802.1d BPDUs.
。 Refresh - Refreshes the screen with most recent data.
4.3.8.5 Spanning Tree MST Port Configuration/Status
Selection Criteria
。 MST ID - Selects one MST instance from existing MST instances.
。 Slot.Port - Selects one of the physical or lag interfaces associated with VLANs associated with the selected MST
instance.
Configurable Data
。 Port Priority - The priority for a particular port within the selected MST instance. The port priority is set in multiples
of 16. For example if the priority is attempted to be set to any value between 0 and 15, it will be set to 0. If it is tried
to be set to any value between 16 and (2*16-1) it will be set to 16 and so on.
。 Port Path Cost - Set the Path Cost to a new value for the specified port in the selected MST instance. It takes a
value in the range of 1 to 200000000.
Non-Configurable Data
。 Auto-calculate Port Path Cost - Displays whether the path cost is automatically calculated (Enabled) or not
(Disabled). Path cost will be calculated based on the link speed of the port if the configured value for Port Path