How to configure access control list for a range of IP addresses

On a dlink dgs 1500 switch, we want to restrict access to only a  range of IP Addresses. This will allow us to block any outsiders who plug into the network and get an IP address through DHCP.  I did the ACL wizard on the switch, but it didn’t work, didn’t block anything.  I’m trying to allow network traffic on this switch only to devices with ip address from 10.2.1.0 to 10.2.1.254.  How do I do this?
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maharlikaAsked:
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arnoldCommented:
You do not allow external users to plug in.
Look at 802.1x this will mean only authorized devices can connect and get access.

Mac locking ports........

How would a person from the outside have access to connect into your switch/LAN?
maharlikaAuthor Commented:
This is an internal switch, it handles patient rooms.  Nurses need to use it but we don't want patients to plug into it with their personal laptops and get an iP address through DHCP. We also don't want to have to put a physical lock on the network drop.
arnoldCommented:
The only way is to use 802.1x or Mac based DHCP reservation. no DHCP Non static allocations.e 802.1x will only allow known systems access, though you would need a switch that supports it has to be a managed switch.
The 802.1x will only be enforced on the PT lines.

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marek1712Commented:
If RADIUS isn't an option, the you can configure port security since this switch has this feature:
Port Security
    Supports up to 64 MAC addresses per port
It'll be a pain in the back, but will work.
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