User's Manual
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. 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. A minimum value of 20 minutes is recommended.
3. Click Apply.
In the CLI
Use the following commands to configure database synchronization.
Command Description
database synchronize
This enable mode command manually synchronizes the
databases and takes effect immediately.
database synchronize period <minutes>
This config mode command defines the scheduled
interval for synchronizing the databases.
Table 108: Database synchronization commands
To view the database synchronization settings on the controller, use the following command:
(host)#show database synchronize
Enabling Incremental Configuration Synchronization (CLIOnly)
Typically when the master and the local is synchronized, the complete configuration is sent to the local. You
can, now send only the incremental updates to the local using the following CLI commands.
Dell Networking W-Series ArubaOS 6.4.x | User Guide Increasing Network Uptime Through Redundancy and VRRP | 584