D-Link DWS-4026 Product Manual - Page 253

Software User Manual 12/10/09 D-Link Unified Access System Table 153: Spanning Tree CST Port Configuration/Status Fields Field Slot/Port Port Priority Admin Edge Port Port Path Cost Auto-calculate Port Path Cost Hello Timer External Port Path Cost Auto-calculate External Port Path Cost BPDU Filter BPDU Flood BPDU Guard Effect Port ID Port Up Time Since Counters Last Cleared Port Mode Port Forwarding State Description Select a physical or port channel interface to configure. The port is associated with the VLAN(s) associated with the CST. The priority for a particular port within the CST. 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. Determines whether the specified port is an Edge Port within the CIST. It takes a value of TRUE or FALSE, where the default value is FALSE. Set the Path Cost to a new value for the specified port in the common and internal spanning tree. It takes a value in the range of 1 to 200000000. 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 zero. Specifies the switch Hello time, which indicates the amount of time in seconds a port waits between configuration messages. The valid range is 1-10, and the default value is 2. The value must be less than or equal to (Bridge Max Age / 2) - 1. The default hello time value is 2. Set the External Path Cost to a new value for the specified port in the spanning tree. It takes a value in the range of 1 to 200000000. Displays whether the external path cost is automatically calculated (Enabled) or not (Disabled). External Path cost will be calculated based on the link speed of the port if the configured value for External Port Path Cost is zero. Enable or disable the BPDU Filter, which filters the BPDU traffic on this port when STP is enabled on this port. Enable or disable the BPDU Flood, which floods the BPDU traffic arriving on this port when STP is disabled on this port. If BPDU Guard is enabled for the switch and the edge port receives a BPDU, the port will be disabled and the status of this field is Enabled. The port identifier for the specified port within the CST. It is made up from the port priority and the interface number of the port. Time since the counters were last cleared, displayed in Days, Hours, Minutes, and Seconds. Spanning Tree Protocol Administrative Mode associated with the port or port channel. The possible values are Enable or Disable. 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. Document 34CSFP6XXUWS-SWUM100-D7 Configuring Spanning Tree Protocol Page 253