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Figure 144: Redundant Topology: Master-Local Redundancy
The network in Figure 144, the master controller is connected to the local Dell controllers on VLANs 1 through
n
through a Layer-2 network. To configure redundancy 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 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 Dell 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 Dell controllers (see Table 140). 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
NOTE: The master controller is configured for a number of VRRP instances (equal to the number of local Dell controllers the master
is backing up).
The following example configuration of the master controller in such a topology for one of the VLANs (in 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 following example configuration on the corresponding local controller.
(host)(config) #vrrp 22
vlan 22
ip address 10.200.22.254
priority 110
preempt
DellPowerConnectW-SeriesArubaOS6.2 | User Guide VRRP | 483