Network names are the same.
When your main network and extended network share a name, it can be difficult to tell which network you are connected to. You have to be connected to the extended network to use extender.linksys.com
We can get around that by accessing settings through your main network.
Network names are different.
1.You have to be connected to the extended network to use extender.linksys.com. On your device, choose your extended network (eg. MyWiFi_Ext).
2.Once connected, reload extender.linksys.com in your browser, enter your admin password and login.