Planet IGSW-2840 User Manual page 548

cost - Path cost for an interface.
(Range: 0 for auto-configuration, 1-65535 for short path cost method24, 1-200,000,000 for long path cost method)
The recommended path cost range is listed in Table 4-63 on page 4-211. The recommended path cost is listed in Table
4-64 on page 4-212.
Default Setting
By default, the system automatically detects the speed and duplex mode used on each port, and configures the path cost
according to the values shown below. Path cost "0" is used to indicate auto-configuration mode. When the short path cost
method is selected and the default path cost recommended by the IEEE 8021w standard exceeds 65,535, the default is
set to 65,535. The default path costs are listed in Table 5-65
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
Each spanning-tree instance is associated with a unique set of VLAN IDs.
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.
Use the no spanning-tree mst cost command to specify auto-configuration mode.
Path cost takes precedence over interface priority.
Example
Console(config)#interface ethernet ethernet 1/5
Console(config-if)#spanning-tree mst 1 cost 50
Console(config-if)#
Related Commands
spanning-tree mst port-priority
Use the spanning-tree pathcost method command on page 4-206 to set the path cost method.
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, no leading zeroes)
priority -Priority for an interface. (Range: 0-240 in steps of 16)
Default Setting
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User's Manual of IGSW-2840