User's Manual

controller. The VRRP instance on the local controller is configured with a higher priority to ensure that when
available, the APs always choose the local controller to terminate their tunnels.
l Configure the interface on the master controller to be a trunk port with 1, 2… n being member VLANs.
l Collect the following data before configuring master controller redundancy.
l VLAN IDs on the controllers corresponding to the VLANs 1, 2…n shown in the topology above.
l Virtual IP addresses that has been reserved to be used for the VRRP instances.
l You can use either the WebUI or CLI to configure VRRP on the master controllers (seeTable 106 ). For this
topology, the following are recommended values:
l For priority: Set the local to 110; set the master to 100 (the default value)
l Enable preemption
The master controller is configured for a number of VRRP instances (equal to the number of local controllers the
master is backing up).
To configure APs, configure the appropriate virtual IP address (depending on which controller is expected to
control the APs) for the LMS IP address parameter in the AP system profile for an AP group or specified AP.
Configure these AP settings on the master controller, not thelocal controller.
As an example, the administrator configures APs in the AP group “floor1” to be controlled by local controller 1,
APs in the AP group “floor2” to be controlled by local controller 2 and so on. All the local controllers are backed
up by the master controller. In the AP system profile for the AP group “floor1”, enter the virtual IP address
(10.200.22.154 in the example configuration) for the LMS IP address on the master controller.
Configuration changes take effect only after you reboot the affected APs; this allows them to reassociate with
the local controller. After rebooting, these APs appear to the new local controller as local APs.
Dell Networking W-Series ArubaOS 6.4.x | User Guide Increasing Network Uptime Through Redundancy and VRRP | 586