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Spanning-tree cost – Accton Technology VS4512DC User Manual

Page 277

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Spanning Tree Commands

4-131

Example

spanning-tree cost

This command configures 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: 1-200,000,000))
The recommended range is:

• Ethernet: 200,000-20,000,000
• Fast Ethernet: 20,000-2,000,000
• Gigabit Ethernet: 2,000-200,000

Default Setting

• Ethernet – half duplex: 2,000,000; full duplex: 1,000,000; trunk: 500,000
• Fast Ethernet – half duplex: 200,000; full duplex: 100,000; trunk: 50,000
• Gigabit Ethernet – full duplex: 10,000; trunk: 5,000

Command Mode

Interface Configuration (Ethernet, Port Channel)

Command Usage

• This command is used by the Spanning Tree Algorithm 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.

• Path cost takes precedence over port priority.
• When the spanning-tree pathcost method (page 4-130) is set to short, the

maximum value for path cost is 65,535.

Example

Console(config)#spanning-tree transmission-limit 4
Console(config)#

Console(config)#interface ethernet 1/5
Console(config-if)#spanning-tree cost 50
Console(config-if)#

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