Method used to configure the reserved IP address of DHCP on USG firewalls

On the USG2000, USG5000, and USG6000, you can configure the reserved IP address of DHCP as follows:
1. Run the system-view command to enter the system view.
2. Run the dhcp server forbidden-ip start-ip-address [ end-ip-address ] command to configure a reserved IP address.
By default, except for the interface IP address of the DHCP server, all IP addresses in the DHCP address pool are used for automatic allocation.
To reserve an IP address, set start-ip-address.
For example, IP address 10.1.1.3 is used as the DNS server address and needs to be reserved.
[USG] dhcp server forbidden-ip 10.1.1.3
To reserve an IP address segment, set start-ip-address and end-ip-address. Ensure that start-ip-address is not equal to or larger than end-ip-address and they are in the same network segment.
For example, IP addresses from 10.1.1.4 to 10.1.1.9 are used as fixed IP addresses and need to be reserved.
[USG] dhcp server forbidden-ip 10.1.1.4 10.1.1.9

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