ZyXEL Communications ES-2048 - Manual (Page 23)

ES-2000 Series Switch Support Notes
All contents copyright (c) 2006 ZyXEL Communications Corporation.
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Assign a range of IP addresses or just one IP address to this rule. In our case,
we set the IP pool from 192.168.1.201 to 192.168.1.203.
After input IP pool, we select “DHCP Option” in Keywords combobox.