@AlokJain I see.... You are using Jio's server for speedtest, and they and Airtel don't mix well. Select some other server while speedtesting. choose anything other than Jio, and speedtest again....

@Kevin_Z I would suggest you look into this hardware (XC220-G3v) and let the developers know about the same RADVD Lifetime issue and DNS server issue as seen in XX530v. This model is very much common...

@AlokJain Both are fine. fast.com is purely automatic and it points to the nearest Netflix cached servers (afaik). speedtest.net is pure synthetic speedtest and depends on server/location + peering....

@AlokJain Stick with 160MHz and Possibly either Channel 100 OR Auto, 160MHz will choose that automatically.

@Kevin_Z I think he meant the Lifetime value changes every restart/reset. Could be intentional or a bug. But devices do get IPv6 addresses and Proper DNS address. Although ISPs with frequent changing...

@xigga Post reset? or restart? My one is working fine and I can change values. You mean reset and upload backup and do that all over again, incase the RADVD Lifetime didn't change?