300-425 · Question #259
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…
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…
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.
How the community answered
(25 responses)- A16% (4)
- B48% (12)
- C8% (2)
- D28% (7)
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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