
Configuring a Redundant System
BIG-IP® Reference Guide 6-11
MAC masquerading is not supported in active-active mode.
Configuring an active-active system
The default mode for BIG-IP redundant systems is active/standby. To use
active-active mode on the BIG-IP redundant system, you must perform the
following tasks, in order. Each task included below is outlined in the
following sections.
• Enable active-active on the BIG-IP.
• Configure an additional floating self IP address on the internal VLAN for
each unit. You must have two floating self IP addresses for the redundant
system.
• Set the routing configuration on the servers that are load balanced by the
active-active BIG-IP system.
• Make sure the BIG/db key Local.Bigip.Failover.UnitId is set at 1 for
one of the units, and 2 for the other.
• Define the virtual servers, NATs, and/or SNATs to run on either unit 2
or 1.
• Update the fail-over mechanism with the configuration changes made in
BIG/db.
• Synchronize the configuration.
• Complete the transition from active/standby to active-active.
Task 1: Enabling active-active on the BIG-IP
The first task you need to complete is to enable active-active on the BIG-IP
in the redundant system.
To enable active-active using the Configuration utility
Perform this procedure on the active unit first. After the active unit is
enabled, wait several seconds and open the Configuration utility for the
other unit. Follow this procedure on the other unit. After you perform this
task on the standby unit, wait several seconds and click the Refresh button
(Microsoft Internet Explorer) or Reload button (Netscape Navigator) on the
browser for both units.
1. In the navigation pane, click System.
The Network Map screen opens.
2. Click the Redundant Properties tab.
The Redundant Properties screen opens.
3. Check the Active-Active Mode Enabled box.
4. Click the Apply button.
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