Solved: dhcp binding shows same device twice

engineerongliss · ‎08-28-2014

I am trying to assign a static IP to a radar on my network. The mac address is 0100.08de.0000.00

I have the following in the running config:

ip dhcp pool radar

host 10.1.30.176 255.255.255.0

hardware-address 0100.08de.0000.00

when i enter show ip dhcp binding

the mac address shows up twice on the list

10.1.30.106 0100.08de.0000.00 aug 29 2014 automatic

10.1.30.176 0100.08de.0000.00 infinite Manual

It appears the radar is receiving a dhcp lease rather than the static address I want it to take. I can ping the radar on 10.1.30.106 not 10.1.30.176.

Why won't the radar accept the .176 ip?

Sandeep Sharma · ‎08-29-2014

Hi

The best way is to first use exclude command and then try client identifier. You can use the steps below:

ip dhcp excluded-address <ip address you are trying to get rid of the lease from>

then instead of hardware-address, try using client-identifier

ip dhcp pool STATIC

host 10.1.130.176 /24

Client-identifier xxxx.xxxx.xxxx

Do ipconfig /release then ipconfig /renew in command prompt and it will bind the IP to the computer's mac address. you can later do "no ip dhcp excluded-address" to make sure the IP add held to the computer.

Or you can also try directly these commands:

ip dhcp pool STATIC

host 10.1.130.176 /24

Client-identifier xxxx.xxxx.xxxx

Thanks & Regards

Sandeep

View solution in original post

Walter Astori · ‎08-29-2014

Can you try to use client-identifier and remove the command hardware-address ?

engineerongliss · ‎08-31-2014

Client-identifier solved my issue. Many thanks

Sandeep Sharma · ‎08-29-2014

Hi

The best way is to first use exclude command and then try client identifier. You can use the steps below:

ip dhcp excluded-address <ip address you are trying to get rid of the lease from>

then instead of hardware-address, try using client-identifier

ip dhcp pool STATIC

host 10.1.130.176 /24

Client-identifier xxxx.xxxx.xxxx

Do ipconfig /release then ipconfig /renew in command prompt and it will bind the IP to the computer's mac address. you can later do "no ip dhcp excluded-address" to make sure the IP add held to the computer.

Or you can also try directly these commands:

ip dhcp pool STATIC

host 10.1.130.176 /24

Client-identifier xxxx.xxxx.xxxx

Thanks & Regards

Sandeep