Question 180
During a planned campus-network change at a public library in Portland, operators discover that after a link failure only one physical path remains but the aggregated interface incorrectly reports no active members. The design must preserve staff and visitor wireless access. What evidence should the engineer request after the repair?
Explanation
Correct Answer
This observation tests the Multi-chassis LAGs and active paths requirement at a public library in Portland. The expected result is that the dual-homed access device negotiates its expected LAG and forwards without a layer-two loop after a controlled member failure. The necessary correction is to configure and verify a supported distributed LAG with compatible LACP settings, member interfaces and corresponding peer relationships; a saved configuration alone would not prove it is working. In this case, the observed fault is that after a link failure only one physical path remains but the aggregated interface incorrectly reports no active members.
Incorrect Answers
At a public library in Portland, this would verify VSX inter-switch link and keepalive, not the failure reported in this scenario. The requested closure criterion instead concerns Multi-chassis LAGs and active paths: the dual-homed access device negotiates its expected LAG and forwards without a layer-two loop after a controlled member failure.
At a public library in Portland, the observation may be useful for a separate First-hop gateway redundancy and failover test, but it does not establish that after a link failure only one physical path remains but the aggregated interface incorrectly reports no active members has been resolved. The relevant check is the Multi-chassis LAGs and active paths outcome.
At a public library in Portland, this measures a different network requirement, VSF member roles and stack consistency. The case describes that after a link failure only one physical path remains but the aggregated interface incorrectly reports no active members, so accepting this result would leave the primary fault without direct verification.