Cisco
300-360 · Question #94
300-360 Question #94: Real Exam Question with Answer & Explanation
The correct answer is A: Mobility Multicast Messaging. In a large mobility group, switching from unicast to multicast messaging reduces inter-controller traffic by replacing per-controller unicast transmissions with a single multicast transmission.
Question
A customer recently placed 10 WLCs in a mobility group and now sees a large amount of additional traffic to and from the controller. What setting should be changed to reduce the traffic?
Options
- AMobility Multicast Messaging
- BMobility Unicast Messaging
- CMobility Anchor Keep Alive Count
- DMobility Anchor Keep Alive Interval
Explanation
In a large mobility group, switching from unicast to multicast messaging reduces inter-controller traffic by replacing per-controller unicast transmissions with a single multicast transmission.
Common mistakes.
- B. Mobility Unicast Messaging is the existing default behavior that is causing the traffic increase, not a setting that would reduce it.
- C. Mobility Anchor Keep Alive Count controls how many missed keepalives trigger a peer-unreachable declaration and does not reduce the overall volume of mobility group messaging traffic.
- D. Mobility Anchor Keep Alive Interval controls the frequency of keepalives sent to anchor controllers, which is a different mechanism from reducing general peer-to-peer mobility group messaging overhead.
Concept tested. WLC mobility group multicast messaging traffic reduction
Reference. https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-10/config-guide/b_cg810/mobility.html
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