SMC Networks TIGERSWITCH 10/100 - Manual (Page 258)

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spanning-tree priority
Use this command to configure the spanning tree priority globally
for this switch. Use the no form to restore the default.
Syntax
spanning-tree priority priority
no spanning-tree priority
priority - Priority of the bridge. (Range: 0 - 65535)
Default Setting
32768
Command Mode
Global Configuration
Command Usage
Bridge priority is used in selecting the root device, root port,
and designated port. The device with the highest priority
becomes the STA root device. However, if all devices have the
same priority, the device with the lowest MAC address will then
become the root device.
Example
spanning-tree cost
Use this command to configure the spanning tree path cost for the
specified interface. Use the no form to restore the default.
Syntax
spanning-tree cost cost
no spanning-tree cost
cost - The path cost for the port. (Range: 1-65535)
Console(config)#spanning-tree priority 40000
Console(config)#