Chapter 18
| Spanning Tree Commands
– 457 –
standard exceeds 65,535, the default is set to 65,535. The default path costs are
listed in Table 92 on page 451.
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
â—† Each spanning-tree instance is associated with a unique set of VLAN IDs.
â—† This command is used by the multiple spanning-tree algorithm to determine
the best path between devices. Therefore, lower values should be assigned to
interfaces attached to faster media, and higher values assigned to interfaces
with slower media.
â—† Use the no spanning-tree mst cost command to specify auto-configuration
mode.
â—† Path cost takes precedence over interface priority.
Example
Console(config)#interface Ethernet 1/5
Console(config-if)#spanning-tree mst 1 cost 50
Console(config-if)#
Related Commands
spanning-tree mst port-priority (457)
spanning-tree mst
port-priority
This command configures the interface priority on a spanning instance in the
Multiple Spanning Tree. Use the no form to restore the default.
Syntax
spanning-tree mst instance-id port-priority priority
no spanning-tree mst instance-id port-priority
instance-id - Instance identifier of the spanning tree. (Range: 0-4094)
priority - Priority for an interface. (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 an interface in the multiple
spanning-tree. If the path cost for all interfaces on a switch are the same, the
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