Cisco
300-365 · Question #160
300-365 Question #160: Real Exam Question with Answer & Explanation
The correct answer is A: Different client subnets are configured on the WLANs. In a Cisco converged access deployment with dual 3850 stacks acting as MC/MA, roaming failures are caused by mismatched subnet configurations and duplicate VLAN assignments across the two stacks.
Wireless Troubleshooting and Optimization
Question
In a converged access deployment with two Cisco Catalyst 3850 stacks, each operating as MC/MA, when a client attempts to roam between the Cisco Catalyst 3850 stacks, roaming fails. When some clients roam, they obtain a new IP address while others disassociate or take a long time to re-associate. Which two statements describe this behavior? (Choose two.)
Options
- ADifferent client subnets are configured on the WLANs
- BThe clients are compatible with Cisco Compatible Extension v3 instead of v4
- CThe same VLAN number is configured on the WLAN on both Cisco Catalyst 3850 stacks
- DThe same Bridge Group ID is configured on both Cisco Catalyst 3850 stacks
- EThe same client subnet is configured on the WLAN on both Cisco Catalyst 3850 stacks
Explanation
In a Cisco converged access deployment with dual 3850 stacks acting as MC/MA, roaming failures are caused by mismatched subnet configurations and duplicate VLAN assignments across the two stacks.
Common mistakes.
- B. Cisco Compatible Extension version compatibility affects features like fast roaming and voice metrics but does not cause IP address changes or disassociation during inter-stack roaming.
- D. Different Bridge Group IDs would cause issues, but identical Bridge Group IDs on both stacks are actually required for proper mobility group operation and are not the cause of the described roaming failures.
- E. Configuring the same client subnet on both stacks is the correct design for seamless Layer 2 roaming, allowing clients to retain their IP address and roam without disruption.
Concept tested. Converged access MC/MA inter-stack roaming failures
Topics
#converged access#inter-controller roaming#VLAN configuration#MC/MA
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