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How to reserve an IP Address using MAC

How to reserve an IP Address using MAC

I have a router (Cisco 1751) that is doing DHCP and also reserving a range of addresses also.

Now what I want to do is also reserve an IP Address to a specific MAC Address.

Currently my dhcp setting look like this

ip dhcp excluded-address
ip dhcp pool Pool1
   dns-server 1.26.x.x 1.26.x.x
   lease 30

I added this

ip dhcp pool stager
client-identifier 0100.1422.52e5.86
client-name pc37021

This does not seem to work because when I have the machine using that MAC address rebooted it still get a .113 address which is in my DHCP range.. Any thoughts?

RE: How to reserve an IP Address using MAC

Ok I figured out the issue, well the hard way... I appeared that after I rebooted the router it worked.. Is there another way this would of worked rather then rebooting the router?

RE: How to reserve an IP Address using MAC

You can verify your DHCP server MAC > IP bindings with:

Router#show ip dhcp binding
Bindings from all pools not associated with VRF:
IP address          Client-ID/              Lease expiration        Type
                    Hardware address/
                    User name       0100.0e08.eadd.a3       Mar 07 2002 07:01 AM    Automatic       0100.14a5.4f77.19       Mar 07 2002 06:20 PM    Automatic       0100.20a6.4cdf.f4       Mar 06 2002 08:35 PM    Automatic

If you see a insistency in here you can clear the binding table with:

Router#clear ip dhcp binding ?
  *        Clear all automatic bindings
  A.B.C.D  Clear a specific binding

Clear entire table: clear ip dhcp binding *
Clear just one: clear ip dhcp binding

Hope this helps.


RE: How to reserve an IP Address using MAC

Thanks Rainman...

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