300-430 Question 65
Single answerA wireless network administrator is deploying multicast in a Cisco Enterprise Wireless Network. The administrator notices that multicast traffic is not being forwarded properly to wireless clients. After investigating, the administrator identifies that IGMP snooping is enabled on the wired network, and the wireless network is configured to use multicast forwarding. Which configuration must the administrator ensure on the wireless LAN controller (WLC) to allow proper multicast forwarding to wireless clients?
- A
Enable Multicast-Multicast mode on the WLC.
- B
Enable Multicast-Unicast mode on the WLC.
- C
Disable IGMP snooping on the wired network.
- D
Enable IGMP Proxy on the WLC.
Show answer and explanation
Correct answer: A
Explanation
To ensure proper multicast forwarding in a Cisco Enterprise Wireless Network, the WLC must be configured in Multicast-Multicast mode when IGMP snooping is enabled on the wired network. This allows multicast traffic to be forwarded natively as multicast to wireless clients, avoiding unnecessary conversion or flooding. Other options such as disabling IGMP snooping or using Multicast-Unicast mode are either suboptimal or irrelevant to the problem.
- A. Correct.
This is the correct answer. Multicast-Multicast mode ensures that multicast packets are forwarded natively as multicast to wireless clients, which is necessary for proper multicast forwarding when IGMP snooping is enabled on the wired network.
- B. Incorrect.
Multicast-Unicast mode converts multicast traffic to unicast frames, which can lead to increased overhead and is not suitable for scenarios with many wireless clients requiring multicast traffic.
- C. Incorrect.
Disabling IGMP snooping on the wired network may allow multicast traffic to propagate, but it is not best practice and could cause unnecessary flooding of multicast traffic across the wired network.
- D. Incorrect.
Enabling IGMP Proxy on the WLC is not relevant to this scenario. IGMP Proxy is used to optimize IGMP signaling between multicast routers and clients, but it does not directly address multicast forwarding issues in this context.