350-401 · Question #1097
350-401 Question #1097: Real Exam Question with Answer & Explanation
The correct answer is A: sampler R-1-1024 mode random 1 out-of-1024 ! interface Gi0/0 ip flow monitor v4Talkers sampler R-1-1024 input ip flow monitor v6Talkers sampler R-1-1024 input. Option A is correct because it configures a NetFlow sampler in random mode with a 1-out-of-1024 ratio, meaning only 1 in every 1024 packets is inspected and processed by NetFlow. This dramatically reduces CPU overhead during high utilization periods while still providing statisti
Question
Refer to the exhibit. An administrator must collect basic statistics about the approximate amount of IPv4 and IPv6 flows entering Gi0/0 using NetFlow. However, the administrator is concerned that NetFlow processing during periods of high utilization on Gi0/0 will overwhelm the router CPU. Which configuration minimizes CPU impact and keeps the data flows across Gi0/0 intact? A. B. C. D.
Options
- Asampler R-1-1024 mode random 1 out-of-1024 ! interface Gi0/0 ip flow monitor v4Talkers sampler R-1-1024 input ip flow monitor v6Talkers sampler R-1-1024 input
- Binterface Gi0/0 policy-map Talkers class class-default police cir percent 50 conform-action transmit exceed-action drop
- Cinterface Gi0/0 flow interval 30 ip flow monitor v4Talkers ip flow monitor v6Talkers
- Dinterface Gi0/0 no ip route-cache ip flow monitor v4Talkers ip flow monitor v6Talkers
Explanation
Option A is correct because it configures a NetFlow sampler in random mode with a 1-out-of-1024 ratio, meaning only 1 in every 1024 packets is inspected and processed by NetFlow. This dramatically reduces CPU overhead during high utilization periods while still providing statistically approximate flow data for both IPv4 (v4Talkers) and IPv6 (v6Talkers) monitors on Gi0/0. Critically, the sampler only affects NetFlow processing-actual traffic flows across the interface remain completely unaffected and intact.
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