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Difference Between Path Cost and Root Path Cost

August 5, 2012

Spanning Tree uses costs associated to ingress ports to calculate the best path to the root bridge. The root path cost is the cumulative cost from the root to any given switch. Each port has a cost associated to it. On a Cisco switch, the port cost can be altered using

SW1 (config-if)# spanning-tree [vlan vlan-id] cost cost

A third term exists which causes a little confusion: path cost. The path cost is the same thing as the port cost, just a different name for it.

From → Tutorial

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