CCIE Data Center (legacy) — Question 121

Which statement about glean throttling in Cisco NX-OS is true?

Answer options

• A. The traffic shaping feature in Cisco NX-OS to avoid bottle necks in the network.
• B. Cisco NX-OS supports a rate-limiting feature to manage the access bandwidth policy for a network by ensuring that traffic falling within specified rate parameters is sent, while dropping packets that exceed the acceptable amount of traffic or sending them a different priority.
• C. When forwarding an incoming IP packet in a line card, if the Address Resolution Protocol request for the next hop is not resolved, the line card forwards the packets to the supervisor. The supervisor resolves the MAC address for the next hop and programs the hardware.
• D. The traffic policing feature manages the maximum rate of traffic through a token bucket algorithm. The token bucket algorithm can use the user-configured values to determine the maximum rate of traffic allowed on an interface at a given moment in time.

Correct answer: C

Explanation

The correct answer is C because it accurately describes how the supervisor in Cisco NX-OS handles unresolved ARP requests by processing packets. Options A and B incorrectly describe traffic shaping and rate-limiting features, which are not directly related to glean throttling. Option D discusses traffic policing, which is also unrelated to the specific function of glean throttling.