Our shared internet network goes down when our friend who pays for a unlimited LTE plan leaves. His phone is essentially the main router. However, recently we decided to create a local network aswell. At this point, I've set up our secondary router (Linksys WRT54G) as an access point. However to do that, I had to disable the DHCP. Is it possible to enable DHCP when the internet connection when the main router goes down, so our devices automatically get assigned IP-Addresses?
In short: Phone (LTE) (used sometimes for internet access) -> Linksys (Either for just LAN access or internet AND LAN access) -> Devices When the phone is gone, the Linksys should start assigning IP-Addresses, since the phone can no longer do it.