Hi friend!
You can configure address protection. Address protection is implemented in special circumstances by locking an IP address pool, excluding an IP address or an IP address segment, or reclaiming an IP address.
Methods of protecting addresses in an address pool are as follows:
You can lock an IP address pool by running commands. When an IP address pool is locked, IP addresses in the address pool cannot be assigned to users.
This method is used when the address pool needs to be deleted but there are users using IP addresses in the address pool. If you lock the address pool, no more IP addresses will be assigned. After all users log out and the occupied IP addresses are released, you can delete the address pool.
You can use this method on a complex network to exclude certain IP addresses.
If some IP addresses in the address pool are in the Occupied state but no user is using them, you can reclaim these IP addresses by running the related command. https://support.huawei.com/enterprise/en/doc/EDOC1100125809/c57973eb/ipv4-address-management-configuration
Hope to help you!