400-007: Cisco Certified Design ExpertDemo

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Refer to the exhibit. Before the new video server was introduced into the network, traffic was evenly balanced across the Layer 3 links on core switches SW1 and SW2. This video server uses multicast to send video streams to hosts, and one of the links between the core switches is now overutilized. Which design solution resolves this issue?

A Aggregate links using Layer 2 link aggregation.
B Add more links between core switches.
C Apply a more granular load-balancing method on SW2.
D Filter IGMP joins on an over-utilized link.
E Apply a more granular load-balancing method on SW1.

Explanation

Multicast RPF selection is made on the receiving device, which is SW1 for traffic arriving from the video server on SW2. Default multicast ECMP behavior can select a single RPF neighbor, concentrating streams from one source on one link. A more granular multicast load-splitting hash on SW1, such as one using source and group information, distributes the video server’s distinct multicast streams across the equal-cost Layer 3 links.

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Cisco IOS XE: IP Multicast Load Splitting Across Equal-Cost Paths

400-007: Cisco Certified Design ExpertDemo

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