Question 300
During a planned campus-network change at a public library in Portland, operators discover that an aggregated uplink loses all traffic on a single physical failure because its member relationships were not validated. 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 LACP aggregation and member consistency requirement at a public library in Portland. The expected result is that the intended active members participate in one operational LAG and a single member loss does not interrupt the logical interface. The necessary correction is to align LACP mode, speed, member selection and VLAN parameters across both aggregation endpoints; a saved configuration alone would not prove it is working. In this case, the observed fault is that an aggregated uplink loses all traffic on a single physical failure because its member relationships were not validated.
Incorrect Answers
At a public library in Portland, this measures a different network requirement, Layer-two edge protection and BPDU controls. The case describes that an aggregated uplink loses all traffic on a single physical failure because its member relationships were not validated, so accepting this result would leave the primary fault without direct verification.
At a public library in Portland, this would verify RSTP root election and loop prevention, not the failure reported in this scenario. The requested closure criterion instead concerns LACP aggregation and member consistency: the intended active members participate in one operational LAG and a single member loss does not interrupt the logical interface.
At a public library in Portland, the observation may be useful for a separate VLAN trunk and native VLAN consistency test, but it does not establish that an aggregated uplink loses all traffic on a single physical failure because its member relationships were not validated has been resolved. The relevant check is the LACP aggregation and member consistency outcome.