Software restrictions of hot standby on the USG2000 and USG5000 series

Software restrictions of hot standby: 1. The software versions on the active and standby devices must be the same. 2. The BootROM versions on the active and standby devices must be the same. 3. The operating mode of the active and standby devices must be the same, that is, both the active and standby devices must be in firewall mode or UTM mode. 4. You are advised to use the initial configuration file on both devices. 5. The names, quantities, and configuration sequence of virtual firewalls on the active and standby devices must be the same. 6. The interfaces on the same slot of the active and standby devices must be added to the same security zone. 7. Configurations of heartbeat interfaces (HRP heartbeat link) on the active and standby devices must be consistent. 8. The service interfaces of the active and standby devices use fixed IP addresses. Therefore, you cannot use the dual-system hot backup function together with functions for obtaining IP address automatically, such as PPPoE dial-up, DHCP client, 3G, and XDSL.

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