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DHCP - IP map to MAC address

Hello,

I wonder, is it possible to configure DHCP on Cisco Router to lease the IP address to specific MAC address? (It's possible with Windows by using Reserve IP address on the option of DHCP server)

Is that possible for Cisco Device to do that? Any ideas?

Thanks, hhs

Reply to
hhs
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Specify a new DHCP pool for each differentiated with each hardware-address that you want to tie in.

Reply to
Doug McIntyre

oh ok ok i got it. so if i want to map 10 addresses then i need to create 10 pools also. great

:) Thanks, hhs

Reply to
hhs

You don't need all options in every pool. The IOS DHCP server is smart enough to pick the options from the less specific pool and the IP address from the special one.

! ip dhcp pool CLIENTS network 192.168.198.0 255.255.255.0 default-router 192.168.198.1 dns-server 192.168.200.5 192.168.199.5 domain-name example.local lease 0 4 ! ip dhcp pool RESERVED-HOST host 192.168.198.80 255.255.255.0 client-identifier 0100.4096.3944.3f !

So the client with MAC 0040.9639.443f will always lease the IP

192.168.198.80/24 with the other options from the pool CLIENTS

For Windows2000/WindowsXP/Vista you'll need to specify the "client-identifier" with a leading "01" for Ethernet instead of the hardware address. Don't know why, other O/Ses DHCP clients requests work with hardware-address.

Reply to
Uli Link

:) thanks for your clear high light. I though i need to do the same same things for every pools. Thanks alots!

Reply to
hhs

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