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Dell EMC Configuration Guide for the S3100 Series 9.14.2.4

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Setting STP path cost as constant

You can set the path cost to be constant for port-channel regardless of the operation status of the port-channel member ports.

To set the STP path cost, use the port-channel path-cost custom command from the PROTOCOL SPANNING-TREE mode.

The following is the example configuration:
DELLEMC(conf)#protocol spanning-tree pvst
DELLEMC(conf-pvst)#port-channel path-cost custom

This command is support in all STP modes such as STP, RSTP, MSTP, and PVST.

To change the path cost to achieve new IEEE standard behavior, use no port-channel path-cost custom command.

Dell EMC Networking OS behavior does not change when a new member port is added to the port-channel or an existing member port is deleted from the configuration. The path cost reflects the cumulative speed of the port-channel member ports.

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