With any critical infrastructure device, redundancy is not an option, it is a must! You will never know when a device can fail without any notification, so building your infrastructure in High Availability, provides peace of mind for all your critical production systems. In this section, we leverage all options to bring redundancy to the firewall level. We explore Palo Alto firewalls running in Active/Passive and Active/Active modes. We also take advantage of load balancing with Active/Active virtual IPs. We finalize the section discussing virtual systems or virtually segmenting your firewall in virtual instances.