This configuration uses both the default HA interface and a backup HA interface. IP routing is not needed, because the two nodes are in the same subnet.
Central Management System (CMS) > Central Management System High Availability Guide > Configuration > Basic configuration > Dual-interface LAN configuration
Central Management System (CMS) > Central Management System High Availability Guide > Configuration > Basic configuration > Dual-interface LAN configuration
Network Security (NX) > Common Security Platform Product Docs > Device Deployment Guide 2025.2 > Azure > Deploying a virtual Central Management High Availability cluster in Microsoft Azure