Two Active Big IP's in HA mode

Network failover can be made more robust by directly connecting your LTM's to each other using a straight-through cable, creating a 'peernet' vlan and /30 self-IP addresses (ex. 192.168.255.0/30 = 192.168.255.1 for Unit 1 and 192.168.255.2 for Unit 2), and then using configuring network failover with the peernet self-IP addresses and your management IP addresses. HA groups or VLAN failsafe can then be applied to the production (non-peernet) trunks/vlans to ensure failover occurs when active unit loses connectivity to the rest of the network