Users Guide

Table Of Contents
Dell PowerConnect ArubaOS 5.0 | User Guide VRRP | 417
If DNS resolution is the chosen mechanism for the APs to discover their master controller, ensure that the name
“aruba-master” resolves to the same virtual IP address configured as a part of the master redundancy.
Configuring Database Synchronization
In a redundant master controller scenario, you can configure a redundant pair to synchronize their WMS and
local user databases. In addition, you can also synchronize RF Plan data between the pair of controllers. You can
either manually or automatically synchronize the databases.
When manually synchronizing the database, the active VRRP master synchronizes its database with the standby.
The command takes effect immediately.
When configuring automatic synchronization, you set how often the two controllers synchronize their databases.
To ensure successful synchronization of database events, you should set periodic synchronization to a minimum
period of 20 minutes.
In the WebUI
1. On each controller, navigate to the Configuration > Advanced Services > Redundancy page.
2. Under Database Synchronization Parameters, do the following:
a. Select the Enable periodic database synchronization check box. This enables database synchronization.
b. Enter the frequency of synchronizing the databases. Dell recommends a minimum value of 20 minutes.
c. By default, RF Plan data is also synchronized. Dell recommends that you always enable this option.
3. Click Apply.
In the CLI
Use the following commands to configure database synchronization.
To view the database synchronization settings on the controller, use the following command:
show database synchronize
Note: All the APs and local controllers in the network should be configured with the virtual IP address as the master IP address.
The master IP address can be configured for local controllers during the Initial Setup (refer to the ArubaOS Quick Start Guide).
You can also use the following commands to change the master IP of the local controller. The controller will require a reboot
after changing the master IP on the controller.
Note: When synchronizing the databases, Dell recommends that you also synchronize RF plan data.
Command Description
database synchronize This enable mode command manually synchronizes the databases
and takes effect immediately.
database synchronize rf-plan-data This config mode command includes RF plan data when
synchronizing databases. This data is included by default.
database synchronize period <minutes> This config mode command defines the scheduled interval for
synchronizing the databases.