Administrator Guide

676 | Increasing Network Uptime Through Redundancy and VRRP Dell Networking W-Series ArubaOS 6.4.x| User Guide
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 132: Database synchronization commands
To view the database synchronization settings on the controller, use the following command:
(host)#show database synchronize
Enabling Incremental Configuration Synchronization (CLIOnly)
Typically when the master and local is synchronized, the complete configuration is sent to the local. However,
you now have the option to send only the incremental updates to the local using the following CLI commands:
Command Description
cfgm set sync-type <complete>
The master sends full configuration file to the
local.
cfgm set sync-type <snapshot>
The master sends only the incremental
configuration to the local.
NOTE: This configuration is enabled by default
cfgm set sync-command-block <number>
To configure the number of command-list blocks.
Each block contains a list of global configuration
commands for each write-mem operationThe
number is 3 by default
show master-configpending
To show a list of global commands, which are not
saved but sent to the local.
clear master-local-session <A.B.C.D>
To manually push the full configuration to the
local.
Table 133: Incremental Configuration Synchronization Commands
Configuring Master-Local Controller Redundancy
This section outlines the concepts behind a redundancy solution where a master can act as a backup for one or
more local controllers, and shows how to configure the Dell controllers for such a redundant solution. In this
solution, the local controllers act as the controller for the APs. When any one of the local controllers becomes
unavailable, the master takes over the APs controlled by that local controller for the time that the local
controller remains unavailable. It is configured such that when the local controller comes back again, it can take
control over the APs once more.
This type of redundant solution is illustrated by the following topology diagram.
This solution requires that the master controller have Layer-2 connectivity to all local controllers.