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High availability Active-Active cluster packet flow
FortiGate-800 Installation and Configuration Guide 89
Weight values are entered in order according to the priority of the units in the cluster.
For example, if you have a cluster of three FortiGate units, you can enter the following
command to configure the weight values for each unit:
set system ha weight 1 3 3
This command has the following results:
• The first connection is processed by the primary unit
• The next three connections are processed by the first subordinate unit
• The next three connections are processed by the second subordinate unit
The subordinate units process more connections than the primary unit, and both
subordinate units, on average, process the same number of connections.
Active-Active cluster packet flow
This section describes packet flow through an active-active HA cluster. The cluster
consists of two FortiGate units (primary and subordinate). Cluster interfaces are
connected using switches.
• NAT/Route mode packet flow
• Configuring switches to work with a NAT/Route mode cluster
• Transparent mode packet flow
Figure 18: Active-active HA packet flow
ServerClient
Switch 1
Switch 2
HA cluster
Primary Unit
Subordinate Unit