300-425 Question 67
Select 3A company is deploying a multicast-based video streaming solution over their Cisco enterprise wireless network. The wireless network is configured to use multicast-to-unicast conversion to optimize traffic delivery. However, users are reporting poor video quality and buffering issues. Upon investigation, the network engineer finds that the APs are overloaded with traffic, and the multicast stream is not being properly distributed across the network. Which of the following actions should the engineer take to resolve the issue?
- A
Enable IGMP Snooping on the wired network switches to optimize multicast traffic delivery.
- B
Configure the wireless controller to use Multicast-direct instead of multicast-to-unicast.
- C
Increase the AP's multicast data rate to a higher value to improve traffic delivery efficiency.
- D
Ensure the wireless client devices support IGMPv3 to enhance multicast traffic processing.
- E
Configure the wireless controller to use a multicast group address for the multicast streams.
Show answer and explanation
Correct answers: A, B, E
Explanation
The poor video quality is caused by the APs being overloaded with multicast-to-unicast traffic. To resolve this, enabling IGMP Snooping on the wired network optimizes multicast traffic delivery, configuring Multicast-direct avoids processing overhead on the APs, and using a multicast group address properly distributes multicast streams and prevents unnecessary unicast traffic. These actions collectively ensure efficient multicast delivery and improve video performance.
- A. Correct.
Enabling IGMP Snooping on the wired network helps optimize multicast traffic forwarding by ensuring that only interested clients receive the multicast streams. This reduces unnecessary traffic on the APs and improves performance.
- B. Correct.
Switching from multicast-to-unicast to Multicast-direct allows the APs to transmit multicast traffic natively, reducing the processing overhead on the APs and improving video quality.
- C. Incorrect.
Increasing the AP's multicast data rate can sometimes reduce coverage for multicast traffic and may not address the root cause of inefficient traffic handling.
- D. Incorrect.
While IGMPv3 support can optimize multicast traffic for advanced use cases, it is not directly related to resolving the AP traffic overload issue or managing multicast delivery.
- E. Correct.
Configuring the wireless controller to use a multicast group address ensures that multicast streams are properly handled and distributed across the network, avoiding unnecessary unicast conversions.