A binding already exists for 172.20.0.77

[shahed.zaman]

I am using CISCO 3650 L3 Switch. Switch is configured as L3 mode. DHCP also running from this Switch. Now I wanna MAC bind in DHCP server.

Here is my DHCP configuration :

ip dhcp pool NAT-Wifi
 network 172.20.0.0 255.255.252.0
 default-router 172.20.0.1
 dns-server 192.168.11.66 202.74.244.5
 lease 0 9
!
ip dhcp pool Reserve-1
 client-identifier 0128.b2bd.2adb.3b

I am trying to configure DHCP IP bind but it is showing error given below :

Core-Switch-2(config)#ip dhcp pool Reserve-1

core-Switch-2(dhcp-config)#host 172.20.0.201 255.255.252.0
% A binding in this subnet already exists.

Can anyone help me to solve this problem?

Thanks

Shahed

[Georg Pauwen]

Hello,

try and delete and then recreate the pool:

--> no ip dhcp pool Reserve-1

--> ip dhcp pool Reserve-1

[Collin Clark]

Try clearing the DHCP binding for that IP and then try your reservation again.

clear ip dhcp binding 172.20.0.201