Software restrictions of hot standby on the USG6000 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. If configuration commands are executed manually on the active and standby devices after the automatic backup function is disabled, the configuration contents are the same but the configuration order is not. For example, the policy matching conditions on the active and standby devices are different. In such cases, the consistency check function will determine that the active and standby device configurations are different. However, this affects neither the hot standby service nor the performance. You just need to re-configure the commands. 4. You are advised to use the initial configuration file on both devices. 5. The service interfaces and heartbeat interfaces used by 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. The interfaces with vrrp virtual-mac enable configured cannot function as the heartbeat interfaces. 8. If the Eth-Trunk is used as the heartbeat interface, you must run the load-balance packet-all command on the Eth-Trunk to set the load balancing mode to per-packet load balancing. 9. 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. 10. The MTU of the heartbeat interfaces must be set to 1500.

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