SUMMARY STEPS
1.
enable
2.
configure terminal
3.
interface interface-id
4.
spanning-tree cost cost
5.
spanning-tree vlan vlan-id cost cost
6.
end
DETAILED STEPS
PurposeCommand or Action
Enables privileged EXEC mode. Enter your password if prompted.enable
Step 1
Example:
Switch> enable
Enters the global configuration mode.configure terminal
Example:
Switch# configure terminal
Step 2
Specifies an interface to configure, and enters interface configuration mode.
Valid interfaces include physical ports and port-channel logical interfaces
(port-channel port-channel-number).
interface interface-id
Example:
Switch(config)# interface
gigabitethernet1/0/1
Step 3
Configures the cost for an interface.
spanning-tree cost cost
Step 4
Example:
Switch(config-if)# spanning-tree
cost 250
If a loop occurs, spanning tree uses the path cost when selecting an interface
to place into the forwarding state. A lower path cost represents higher-speed
transmission.
For cost, the range is 1 to 200000000; the default value is derived from the
media speed of the interface.
Configures the cost for a VLAN.
spanning-tree vlan vlan-id cost cost
Step 5
Example:
Switch(config-if)# spanning-tree
vlan 10,12-15,20 cost 300
If a loop occurs, spanning tree uses the path cost when selecting an interface
to place into the forwarding state. A lower path cost represents higher-speed
transmission.
•
For vlan-id, you can specify a single VLAN identified by VLAN ID
number, a range of VLANs separated by a hyphen, or a series of
VLANs separated by a comma. The range is 1 to 4094.
•
For cost, the range is 1 to 200000000; the default value is derived
from the media speed of the interface.
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
232
How to Configure Spanning-Tree Features
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