Dell 6.2 Figure 144:

Figure 144: RedundantTopology: Master-LocalRedundancy
The network in Figure1 44, the master controlleris connected to t helocal Dell controllers on VLANs 1 through n
througha Layer-2 netwo rk.To configureredundancy as described in the conceptual overview for master-local
redundancy,configure VRRP instances on each of the VLANs between the master and the respective local controller.
The VRRP instance on the local controlleri s configuredwith a higher priority to ensure that when available, the APs
always choose the local controller to terminate their tunnels.
lConfigurethe interface on the master controller to be a trunk port with 1, 2… n being memberVLA Ns.
lCollect the following data before configuringmaster controller redundancy.
lVLANIDs on the Dell controllerscorresponding to the VLANs 1, 2… n shown in the topology above.
lVirtual IP addresses that has been reservedt o be used for the VRRP instances.
lYou can useei therthe WebUI or CLI t o configureVR RP on the master Dell controllers(see Table 140). For
this topology, the following are recommendedvalues:
lFor priority: Set the localt o 110; set the master to 100 (the default value)
lEnable preemption
NOTE:The m astercontroller i sconfigured for a number of VR RP instances (equal tothe number of local Dellcontrollers the master
isbacking up).
The followingexample configuration of the master controller in such a topology for one of the VLANs (i n this case
VLAN 22).
(host)(config) #vrrp 22
vlan 22
ip address 10.200.22.254
priority 100
preempt
authentication password
description Master-acting-as-backup-to-local
tracking master-up-time 30 add 20
no shutdown
The followingexample configuration on the corresponding local controller.
(host)(config) #vrrp 22
vlan 22
ip address 10.200.22.254
priority 110
preempt
DellPowerConnect W- Series ArubaOS 6.2 | UserGuide VRRP | 483