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spanning-tree priority
Command Mode
Global Configuration
Command Usage
The path cost method is used to determine the best path between devices.
◆
Therefore, lower values should be assigned to ports attached to faster
media, and higher values assigned to ports with slower media. Note that
path cost
(page
425) takes precedence over port priority
◆
The path cost methods apply to all spanning tree modes (STP, RSTP and
MSTP). Specifically, the long method can be applied to STP since this
mode is supported by a backward compatible mode of RSTP.
Example
Console(config)#spanning-tree pathcost method long
Console(config)#
This command configures 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 – 0-61440, in steps of 4096;
Options: 0, 4096, 8192, 12288, 16384, 20480, 24576, 28672,
32768, 36864, 40960, 45056, 49152, 53248, 57344, 61440)
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 (i.e., lower numeric value) 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
Console(config)#spanning-tree priority 40960
Console(config)#
Chapter 17
– 417 –
| Spanning Tree Commands
(page
433).
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