A network engineer just finished deploying a converged access wireless infrastructure. The configuration consists of Cisco Catalyst 3850 Series switches operating as mobility controllers and agents in multiple switch peer groups and mobility subdomains. Which change must be made to allow for seamless roaming between switch peer groups?
A. Add one Cisco 5760 WLC as a mobility oracle and configure on each of the mobility controllers in the converged access infrastructure.
B. Add another Cisco Catalyst 3850 switch as a mobility oracle and configure on each of the mobility controllers in the converged access infrastructure.
C. Convert one controller to a mobility oracle while the other mobility controllers and agents should be configured in the same mobility domain.
D. Configure all switches as mobility controllers in the same switch peer group to allow for seamless roaming.
A is correct.
Mobility oracle only can implement on WLC. It will help to seamless roaming because MO acts as the point of contact for mobility events that occur across mobility subdomains
Why option D is not correct one, it’s because if all switches act as mobility controller but only 1 running as MC. It will not help to allow seamless roaming in sub-domain.
https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/3se/system_management/configuration_guide/b_sm_3se_3850_cg/b_sm_3se_3850_cg_chapter_0111.html
Answer is A