If you are deploying the VM-Series firewalls
in a high availability (active/passive) configuration, you must
ensure the following: Create an IAM role and assign
the role to the VM-Series firewall when you are deploying the instance.
See IAM Roles for HA. Deploy the HA peers in the same AWS availability zone. The active firewall in the HA pair must have at a minimum three
ENIs: two dataplane interfaces and one management interface.
The
passive firewall in the HA pair, must have one ENI for management,
and one ENI that functions as dataplane interface; you will configure
the dataplane interface as an HA2 interface.
Do not attach
additional dataplane interfaces to the passive firewall in the HA
pair. On failover, the dataplane interfaces from the previously
active firewall are moved —detached and then attached—to the now
active (previously passive) firewall.
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