STP Tie Breakers

Question 1

STP Root Port

Answer 1

• Interface associated with lowest root path cost
• Interface who’s neighbor has lowest system priority
• Interface who’s neighbor has lowest base MAC address
• Interface who’s neighbor has the lowest port priority
• Interface who’s neighbor has the lowest interface index

Question 2

STP Designated Port

Answer 2

• Cannot be a root port
• The port on the switch with the lowest root path cost
• The port on the switch with the lowest system priority
• The port on the switch with the lowest base MAC address