Question 80
Two distribution switches announce separate physical gateway addresses and clients lose access when one is removed. Which switching implementation or corrective action BEST addresses the underlying requirement?
Explanation
Correct Answer
Provide a supported resilient default gateway design and test active-forwarding behavior under peer failure. This addresses the controlling network requirement rather than merely changing its symptoms. A shared-looking gateway IP does not prove failover is configured or that the chosen platform supports the intended mechanism. Verify before and after with: Inspect VRRP role/priority or VSX active gateway configuration, virtual MAC/IP, peer state and ARP entries. Scenario: Two distribution switches announce separate physical gateway addresses and clients lose access when one is removed.
Incorrect Answers
Use separate VRFs for management, corporate, and guest routing where specified, with explicit approved inter-VRF connectivity. This action instead applies to VRF isolation and controlled route leaking. VRFs separate routing tables, but they do not replace security policy on deliberately interconnected services. It does not directly resolve the controlling requirement. The targeted response is: Provide a supported resilient default gateway design and test active-forwarding behavior under peer failure. Scenario: Two distribution switches announce separate physical gateway addresses and clients lose access when one is removed.
Apply group-level switching policies only after confirming device model compatibility and whether the site is UI-group or template-group managed. This action instead applies to Central UI group versus template configuration scope. Template and UI group management workflows are not interchangeable, especially for device-specific variable substitution. It does not directly resolve the controlling requirement. The targeted response is: Provide a supported resilient default gateway design and test active-forwarding behavior under peer failure. Scenario: Two distribution switches announce separate physical gateway addresses and clients lose access when one is removed.
Differentiate RADIUS latency and repeated endpoint authentication churn from application packet loss or physical interface faults. This action instead applies to Authentication storms and endpoint retry load. Authentication storms can degrade perceived access and control-plane performance despite normal link LEDs. It does not directly resolve the controlling requirement. The targeted response is: Provide a supported resilient default gateway design and test active-forwarding behavior under peer failure. Scenario: Two distribution switches announce separate physical gateway addresses and clients lose access when one is removed.

