C
HAPTER
32
| Spanning Tree Commands
– 815 –
RELATED COMMANDS
spanning-tree mst cost (813)
spanning-tree
port-priority
This command configures the priority for the specified interface. Use the
no form to restore the default.
SYNTAX
spanning-tree port-priority priority
no spanning-tree port-priority
priority - The priority for a port. (Range: 0-240, in steps of 16)
DEFAULT SETTING
128
COMMAND MODE
Interface Configuration (Ethernet, Port Channel)
COMMAND USAGE
â—† This command defines the priority for the use of a port in the Spanning
Tree Algorithm. If the path cost for all ports on a switch are the same,
the port with the highest priority (that is, lowest value) will be
configured as an active link in the spanning tree.
â—† Where more than one port is assigned the highest priority, the port with
lowest numeric identifier will be enabled.
EXAMPLE
Console(config)#interface ethernet 1/5
Console(config-if)#spanning-tree port-priority 0
RELATED COMMANDS
spanning-tree cost (808)
spanning-tree
root-guard
This command prevents a designated port
19
from taking superior BPDUs
into account and allowing a new STP root port to be elected. Use the no
form to disable this feature.
SYNTAX
[no] spanning-tree root-guard
DEFAULT SETTING
Disabled
19. See Port Role under "Displaying Interface Settings for STA" on page 217.
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