Question 620
At the Elmfield engineering office, R-ELM-EDGE1 has a correct PBR route map, but client traffic entering the LAN interface still follows the normal routing table toward the Midtown engineering center. Which continuing operational control is most directly relevant to preventing this problem?
Explanation
Correct Answer
The safeguard follows the failure mechanism at the Elmfield engineering office. Inspect policy attachment and match counters after interface or traffic-source changes.
Incorrect Answers
This would manage a different failure pattern. IGP hello/dead timers alone are too slow to detect the observed forwarding-path failure. It is not the most direct recurring check for policy-based routing ingress application at the Elmfield engineering office.
This is useful for another concern: Continuously test the availability of next hops referenced by routing policies. It does not continuously test policy-based routing ingress application at the Elmfield engineering office.
This would manage a different failure pattern. The interface was not placed in the customer VRF, so routing separation is ineffective for that link. It is not the most direct recurring check for policy-based routing ingress application at the Elmfield engineering office.