Question 160
During a planned campus-network change at a public library in Portland, operators discover that a campus distribution pair has valid downstream links but the VSX peer-status output is unhealthy. The design must preserve staff and visitor wireless access. Which test result most directly confirms the required behavior?
Explanation
Correct Answer
This observation tests the VSX inter-switch link and keepalive requirement at a public library in Portland. The expected result is that the VSX peers show intended primary/secondary state with healthy ISL and keepalive, and a fault test preserves eligible forwarding. The necessary correction is to validate the VSX inter-switch link, keepalive path and peer synchronization before depending on dual-switch redundancy; a saved configuration alone would not prove it is working. In this case, the observed fault is that a campus distribution pair has valid downstream links but the VSX peer-status output is unhealthy.
Incorrect Answers
At a public library in Portland, this would verify First-hop gateway redundancy and failover, not the failure reported in this scenario. The requested closure criterion instead concerns VSX inter-switch link and keepalive: the VSX peers show intended primary/secondary state with healthy ISL and keepalive, and a fault test preserves eligible forwarding.
At a public library in Portland, the observation may be useful for a separate VSF member roles and stack consistency test, but it does not establish that a campus distribution pair has valid downstream links but the VSX peer-status output is unhealthy has been resolved. The relevant check is the VSX inter-switch link and keepalive outcome.
At a public library in Portland, this measures a different network requirement, Multi-chassis LAGs and active paths. The case describes that a campus distribution pair has valid downstream links but the VSX peer-status output is unhealthy, so accepting this result would leave the primary fault without direct verification.