Method used to configure two IP addresses for an interface on the USG firewall and set the primary IP address as the dynamic IP address allocated by the DHCP gateway

You can configure two IP addresses for an interface on the USG2000, USG5000, and USG6000 and set the primary IP address as the dynamic IP address allocated by the DHCP gateway as follows:
Note: The SUB address can only be configured as a static IP address of the PC.
[USG]interface GigabitEthernet0/0/1
[USG-GigabitEthernet0/0/1]ip address 192.168.2.1 255.255.255.0
[USG-GigabitEthernet0/0/1]ip address 192.168.1.1 255.255.255.0 sub
[USG-GigabitEthernet0/0/1]quit
[USG] dhcp server ip-pool 0
[USG-dhcp-0]network 192.168.2.0 mask 255.255.255.0
[USG-dhcp-0]dns-list 192.168.2.3
[USG-dhcp-0] quit
IP addresses in network segment 192.168.2.0 can be dynamically allocated.
IP addresses in network segment 192.168.1.0 are static IP addresses set on the PC.

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