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372 Configuring and managing spanning tree protocol
NN47250-500 (320657-F Version 02.01)
Changing STP port parameters
You can change the STP cost and priority of an individual port, on a global basis or an individual VLAN basis.
Changing the STP port cost
To change the cost of a port, use one of the following commands.
set spantree portcost port-list cost cost
set spantree portvlancost port-list cost cost {all | vlan vlan-id}
The set spantree portcost command changes the cost for ports in the default VLAN (VLAN 1) only. The set spantree
portvlancost command changes the cost for ports in a specific other VLAN or in all VLANs.
Specify a value from 1 through 65,535 for the cost. The default depends on the port speed and link type. (See Table 1 on
page 369.)
The all option applies the change to all VLANs. Alternatively, specify an individual VLAN.
To change the cost on ports 3 and 4 in the default VLAN to 20, type the following command:
WSS# set spantree portcost 3,4 cost 20
success: change accepted.
To change the cost for the same ports in VLAN mauve, type the following command:
WSS# set spantree portvlancost 3,4 cost 20 vlan mauve
success: change accepted.
Resetting the STP port cost to the default value
To reset the STP port cost to the default value, use one of the following commands:
clear spantree portcost port-list
clear spantree portvlancost port-list {all | vlan vlan-id}
The command applies only to the ports you specify. The port cost on other ports remains unchanged.
To reset the cost of ports 3 and 4 in the default VLAN to the default value, type the following command:
WSS# clear spantree portcost 3-4
success: change accepted.
To reset the cost of ports 3 and 4 for VLAN beige, type the following command:
WSS# clear spantree portvlancost 3-4 vlan beige
success: change accepted.