Hi Sathish,
Thanks much for providing config.
I could there is one vlan on the controller with DHCp configured and again we have the default gateway to the controller itself.
Could you please confirm the below things:-
Are we able to ping the client gateway ?
Is the client able to do nslookup to google or yahoo?
Are we able to ping controller gateway ?
Can we do a traceroute to 4.2.2.2 from controller ?
You can also reach me at 408.585.1928 for any help.
Are we looking for any specific configuration on the 620 controller that i can help you?
From running-config, i see we have pretty much the basic config itself.
Thank you,
Sriram S
Technical Support Engineer
srirams@arubanetworks.com