@David_4321 AX20 doesn't support 'Range Extender' mode. You can configure AX20 in AP mode (Case 1) and use both its 2.4/5GHz wireless bands to extend your wireless coverage. The connection in this...

@gtkannan.-98 Archer C5 v4 is an ISP provided device, which FW was build for that specific ISP. You should contact your ISP with this request.

@Aldgate Refer this thread for more details.

@stoptaggingme Here's the link to the FW release in question with notes on what has been changed/improved. a) This is a genuine upgrade. b) It may still be unavailable on some regional support...

@Eur0star You have to put Vr600 in bridge mode for this to work. Check out this story. There's a another guide for using this type of configuration here.

@RussC Check your cable modem DHCP configuration. Its DHCP server should be turned OFF if you use AX50 as a main DHCP server. What is happening, is probbably some of your devices receive their IP...