Several SMs exist on a subnet. What sets which becomes master?
Why B is the answer
Priority
The highest priority wins, then the lowest GUID.
In detail
- The highest priority wins, then the lowest GUID.
- Ties go to the lowest GUID.
Use case
An illustrative scenario, not a real incident.
Two SMs exist, and the higher priority wins.
See it in different ways
flowchart LR A["Discover fabric"] --> B["Assign LIDs"] B --> C["Program routing tables"] C --> D["Ports go Active"] D --> E["Standby SM takes over on failure"]
sequenceDiagram participant M as Master SM participant S as Standby SM participant F as Fabric M->>F: Configures the fabric S->>M: Checks that it is alive S->>F: Takes over if the master fails
flowchart TD
Q{"Are priorities equal?"}
Q -->|"No"| A0["Highest priority wins"]
Q -->|"Yes"| A1["Lowest GUID wins"]Key point: Priority picks the master.
Why the other options are wrong
- A. Switch model
- Model is unrelated.
- C. Cable length
- Cable length is unrelated.
- D. Port count
- Port count is unrelated.