Question 160
A large IS-IS domain undergoes maintenance with rapidly flapping optical links. Observed: Repeated LSP floods overload route processors across the metro. Which change-acceptance control is most relevant to preventing this exact failure?
Explanation
Correct Answer
The control is specific to the initial failure. It requires the result LSP churn declines while a legitimate failover still converges promptly. and treats Repeated LSP floods overload route processors across the metro. as a failure signal. The causal concern is an unstable interface causes repeated topology regenerations and spf scheduling.
Incorrect Answers
It is valid for another service scenario but checks the lsdb shows a second device's lsp under an existing system id. This case instead needs a gate for repeated lsp floods overload route processors across the metro and evidence that lSP churn declines while a legitimate failover still converges promptly.
This gate monitors a different failure, neighbors show up but a route is transiently absent on one pe. It would not detect the current problem: Repeated LSP floods overload route processors across the metro. The appropriate check requires lSP churn declines while a legitimate failover still converges promptly.
The proposed control is tied to one or more devices retain incompatible metric-style processing, typically observed when paths appear with maximum legacy metric rather than engineering cost. Here the target is an unstable interface causes repeated topology regenerations and spf scheduling; monitor lSP churn declines while a legitimate failover still converges promptly.