3Com WX4400 Reference Manual page 221

Changing STP Port Settings in a VLAN
1 Access the VLAN table:
a Select the Configuration tool bar option.
b In the Organizer panel, click the plus sign next to the WX switch.
c Click the plus sign next to System.
d Select VLANs.
2 In the Content panel, select the VLAN.
3 Click Properties.
4 Click the Spanning Tree Ports tab.
5 To enable spanning tree packet processing (Tx/Rx) on that port, make
sure Enabled is selected. This is the default.
To disable this feature, clear Enabled. If you disable spanning tree packet
processing on the port, the following might happen:
If STP is enabled on the VLAN, spanning tree packets are dropped at
the port.
If STP is disabled on the VLAN, spanning tree packets are forwarded
transparently through the VLAN to and from that port.
6 In the Port Priority box, specify a priority value (0 to 255). The default is 128.
7 In the Path Cost box, specify a value (0 to 65,535) for the cost. The
default depends on the port speed and link type:
1000 Mbps, full duplex aggregate link (port group)—3
1000 Mbps, full duplex—4
100 Mbps, full duplex aggregate link (port group)—15
100 Mbps, full duplex—18
100 Mbps, half duplex—19
10 Mbps, full duplex aggregate link (port group)—90
10 Mbps, full duplex—95
10 Mbps, half duplex—100
Specify 0 to use the default cost for the port based on link speed.
8 To enable port fast convergence, select the PortFast checkbox.
Viewing and Configuring VLANs 221