Option 7 at IOS DHCP

Ofcourse you want all logging goto a syslog server. (It’s also a Cisco recommendation. See WLC Configu Guide)
You can configure a IOS DHCP Scope like :

ip dhcp exclude
ip dhcp pool VLAN1
network /24
option 7 ip
option 43 hex f1040a0a0a0a

In my own lab the option 7 wasn’t working !
I had tested the WLC with versions 4.2.130 and 4.2.176.

Then I saw :
%LWAPP-3-CLIENTEVENTLOG: Did not get any DNS options from DHCP.
That’s not good..

After changing it to 4.2.209 the option 7 is working and you’ll see at the LWAPP :

%LWAPP-3-CLIENTEVENTLOG: Got log server settings( from DHCP.

About Joost van der Made


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