Spanning Tree Operation

Question 1

What is the Spanning Tree Operation?

Answer 1

1. Determine root bridge: The bridge advertising the lowest bridge ID becomes the root bridge.
2. Select root port: Each bridge selects its primary port facing the root.
3. Select designated ports: One designated port is selected per segment.
4. Block ports with loops: All non-root and non-designated ports are blocked.

Question 2

What is in the BPDU packet for RB?

Answer 2

• Priority - legacy STP - Default: 32678
• MAC Address - legacy STP
• VLAN - RPVST

Question 3

What is the priority set by default?

Answer 3

Priority is set to 32678

Question 4

What is Bridge ID?

Answer 4

The combination of the priority & MAC Address is called Bridge ID.

Question 5

How to select the Root Ports (RP)?

Answer 5

The switchport with the lowest priority wins to become the RP.
- Port Cost
- Bridge ID
- Senders Port Priority