Here is steps to configure DHCP reservation with MAC address on Cisco Catalyst 3750
IP Pool : 10.10.10.0/24
MAC#1 : 1111.2222.3333
MAC#2 : 4444.5555.6666
* You cannot use network range on MAC Address based reservation DHCP configuration
[DHCP]
ip dhcp pool node1
host 10.10.10.50 255.255.255.0
client-identifier 0111.1122.2233.33
client-name node1
default-router 10.10.10.1
ip dhcp pool node2
host 10.10.10.51 255.255.255.0
client-identifier 0144.4455.5566.66
client-name node2
default-router 10.10.10.1
[BOOTP]
ip dhcp pool node1
host 10.10.10.50 255.255.255.0
hardware-address 0111.1122.2233.33
client-name node1
default-router 10.10.10.1
ip dhcp pool node2
host 10.10.10.51 255.255.255.0
hardware-address 0144.4455.5566.66
client-name node2
default-router 10.10.10.1