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Exams300-425Questions#259
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300-425 · Question #259

300-425 Question #259: Real Exam Question with Answer & Explanation

The correct answer is B: Create a mobility tunnel between WLC-A and WLC-B with the same group name.. On Cisco 9800 controllers, inter-WLC roaming and client-context synchronization (including IP address retention) requires configuring them in the same mobility domain. By assigning the same mobility group name and adding each other as mobility peers, the controllers automatically

Question

A customer has this wireless design at its main branch: - two Cisco Catalyst 9800 Series wireless controllers named WLC-Aand WLC-B in an N+1 configuration - the same WLANs with different Layer 3 interfaces for each WLC - 100 APs in local mode WLC-A manages the APs for a building named Building A. WLC-B manages the APs for a building named Building B. The customer wants to ensure that users can remain connected and retain their session state, including the IP address, when they move between buildings. How must this requirement be incorporated into the design?

Options

  • AConfigure WLC-A and WLC-B in a high-availability cluster and set a mobility MAC address.
  • BCreate a mobility tunnel between WLC-A and WLC-B with the same group name.
  • CImplement AP groups for each building by using the same name on WLC-A and WLC-B.
  • DConnect WLC-A and WLC-B by using the redundancy port to sync client sessions.

Explanation

On Cisco 9800 controllers, inter-WLC roaming and client-context synchronization (including IP address retention) requires configuring them in the same mobility domain. By assigning the same mobility group name and adding each other as mobility peers, the controllers automatically build the control- and data-plane tunnels needed for seamless Layer-3 roaming between buildings.

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