Question 240
At Lakeside Classroom, a topology change moves the root toward a low-bandwidth edge switch. What measured or witnessed result should be required before signoff?
Explanation
Correct Answer
For Lakeside Classroom, the decisive mechanism is RSTP root placement. RSTP uses a root bridge and port roles to build a loop-free Layer 2 topology. Fail an uplink and verify deterministic rapid reconvergence without unexpected blocking supplies measurable, case-relevant evidence that the intended behavior actually occurs.
Incorrect Answers
This is relevant to VSX active gateway, where vSX active gateway allows distributed L3 gateway forwarding when configured consistently In the Lakeside Classroom case, That test could pass while the actual user-facing requirement still fails. The specific mechanism is rSTP uses a root bridge and port roles to build a loop-free Layer 2 topology
This is relevant to VSX inter-switch link, where vSX peers synchronize selected state over an ISL while retaining independent control planes In the Lakeside Classroom case, That test could pass while the actual user-facing requirement still fails. The specific mechanism is rSTP uses a root bridge and port roles to build a loop-free Layer 2 topology
This is relevant to VSX keepalive separation, where the VSX keepalive helps distinguish peer failure from ISL failure In the Lakeside Classroom case, That test could pass while the actual user-facing requirement still fails. The specific mechanism is rSTP uses a root bridge and port roles to build a loop-free Layer 2 topology