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Campus Wireless Networks Validated Reference Design Version 3.3 | Design Guide Campus WLAN Validated Reference Design | 21
Aggregation Layer Mobility Controllers allow user traffic to stay close to associated servers; there is
no need to tunnel user traffic all the way to the Management layer.
z Wireless Access
The Wireless Access layer is comprised of APs: single or dual-band, 802.11a/b/g or n, indoor or
outdoor. They can be connected using wired switch ports, secure mesh or Remote AP.
Together, the Management, Aggregation, and Wireless Access layers overlay on the Core, Distribution
and Access infrastructure in a seamless, secure and high-performance manner. Any Aruba controller
can serve as in the Management and Aggregation layer, and in smaller networks, a single controller
provides both functions.
The network architect typically chooses the controller model that has capacity appropriate to the size
of the user and AP population. In contrast to the Core/Distribution/Access model with capacity
increasing as you approach the Core; a User-Centric network requires more capacity in the middle layer
where tunnels are terminating and policies are being applied.
Other Aruba Reference Architectures
This Campus Wireless LAN Reference Architecture represents a large scale, highly available WLAN
deployment model for a campus environment with numerous buildings that house thousands of users.
This is the recommended deployment for this environment. There are other reference architectures that
are considered best practices at different scales, and for different types of customer scenarios. Other
Reference Architecture models that are commonly deployed by our customers are described in
Appendix C on page 71.
arun_046
Air monitor
Control
Data
Local Local
Master
standby
Data center
Master
active
Web
File
RADIUS
PBX
Management
Aggregation
Wireless
Access