FS728TP Smart Switch Software Administration Manual
4-34 Configuring Switching Settings
v1.1, September 2009
– Disabled – Indicates STP is currently disabled on the port. The port forwards traffic
while learning MAC addresses.
– Blocking – Indicates the po rt is currently blocked and cannot forward traffic or learn
MAC addresses.
– Listening – Indicates the port is in Listening mode. The port cannot forward traffic nor
can it learn MAC addresses.
– Learning – Indicates the port is in Learning mode. The port cannot forward traffic,
however it can learn new MAC addresses.
•Speed – Displays the speed at which the port is operating.
•Path Cost – Enter the value used to assign default path cost to STP ports. The possible
field range is 1 - 2000000 00 . The default path cost assigned to an interface varies
according to the selected CST configuration method (Hello Time, Max Age or Forward
Delay).
•Priority – Select the port priority value. When switches or ports are running STP, each is
assigned a priority. After exchangi ng BP DUs, t he device with the lowest priority value
becomes the Root Port. The port priority has a range of 0-240 in increments of 16. The
default value is 128.
2. Select the STP Status and Fast Link status in the provided fields.
3. Enter the Path Cost in the provided field.
4. Select the Priority from the list in the provided field.
5. Click APPLY to update the device.
RSTP
While Classic STP prevents forwarding loops in a general network topology , conver gence can take
between 30-60 seconds. This time may delay detecting possible loops and propagating status
topology changes. Rapid Spanning T ree Protocol (RSTP) detects and uses network topologies that
allow a faster STP convergence without creating forwarding loops. The Global System LAG
information displays the same field information as the ports, but represents the LAG RSTP
information.
To define RSTP on the device:
1. Click Switching > STP > Adva nce d > RSTP. The Rapid STP screen displays:
The Rapid STP screen contains the following fields:
•Interface – Displays the port or LAG on which Rapid STP is enabled or disabled.