Users Guide

Table Of Contents
Dell PowerConnect W-Series ArubaOS 6.1 | User Guide VRRP | 493
Figure 81 Redundant Topology: Master-Local Redundancy
The network in Figure 81, the master controller is connected to the local 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.
Configure the interface on the master controller to be a trunk port with 1, 2… n being member VLANs.
Collect the following data before configuring master controller redundancy.
VLAN IDs on the controllers corresponding to the VLANs 1, 2…n shown in the topology above.
Virtual IP addresses that has been reserved to be used for the VRRP instances.
You can use either the WebUI or CLI to configure VRRP on the master controllers (see Table 96). For this
topology, the following are recommended values:
For priority: Set the local to 110; set the master to 100 (the default value)
Enable preemption
The following example configuration of the master controller in such a topology for one of the VLANs (in this
case VLAN 22).
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.
vrrp 22
vlan 22
ip address 10.200.22.254
priority 110
NOTE: The master controller is configured for a number of VRRP instances (equal to the number of local controllers the master is
backing up).