Controller Architecture Flashcards

Which Aruba controller feature automatically optimizes channel and power settings for APs in the network?

Answer: ARM

ARM (Adaptive Radio Management) dynamically adjusts AP channel selection and transmit power to optimize coverage and minimize interference.

What is a Virtual Mobility Controller (MC-VA) in Aruba's product line?

Answer: A software-based controller deployed on a hypervisor

The MC-VA is Aruba's virtualized controller that runs as a VM on standard hypervisors such as VMware ESXi or KVM.

In Aruba's Master-Local controller architecture (pre-Mobility Master), what is the primary function of the Master Controller?

Answer: Distribute configuration and policies to Local Controllers

The Master Controller in the legacy architecture distributes configuration and manages Local Controllers, similar to how Mobility Master functions in newer deployments.

Which port does CAPWAP control traffic use by default?

Answer: UDP 5246

CAPWAP control messages between APs and the controller use UDP port 5246 by default.

What does CAPWAP data traffic (AP-to-controller tunneled user data) use by default?

Answer: UDP 5247

CAPWAP data traffic is carried over UDP port 5247, separate from the control channel on UDP 5246.

Which Aruba solution provides centralized management, monitoring, and reporting for controller-based and controller-less WLAN deployments?

Answer: Central

Aruba Central is the cloud-based network management platform supporting both controller-based and Instant AP deployments.

In an Aruba controller cluster, what is the purpose of the cluster Virtual IP (VIP)?

Answer: Provide a single IP for APs and clients to connect to regardless of which controller is active

The cluster VIP provides a stable IP address that floats between controller cluster members, ensuring seamless failover for APs and clients.