Question 670
At the Bayview university campus, an eBGP neighbor begins advertising unrelated routes and R-BAY-DIST1 installs more prefixes than the agreed customer set. Which continuing operational control is most directly relevant to preventing this problem?
Explanation
Correct Answer
The safeguard follows the failure mechanism at the Bayview university campus. Monitor accepted-prefix counts and prefix-filter changes per eBGP peer.
Incorrect Answers
That safeguard protects against ebgp non-direct neighbor multihop, not the concrete risk described at the Bayview university campus. The current inbound BGP policy fails to constrain accepted advertisements to contracted prefixes.
This is useful for another concern: Test internal BGP propagation and exit choice after modifying local-preference policies. It does not continuously test bgp inbound prefix filtering at the Bayview university campus.
This would manage a different failure pattern. Cisco BGP weight affects path selection only on the local router and is not propagated to peers. It is not the most direct recurring check for bgp inbound prefix filtering at the Bayview university campus.