Hello @TheGoob ,
looking at your config, I would do the following changes:
1. cleanup the two L3 interfaces, Gi0/0/0 and Gi0/0/1, spanning tree commands not applicable
interface GigabitEthernet0/0/0
no spanning-tree portfast
interface GigabitEthernet0/0/1
no spanning-tree portfast
2. interface Gi0/1/7 which I believe connects to the SG350 switch should run STP
interface GigabitEthernet0/1/7
no spanning-tree portfast
3. delete the ppp mtu adaptive on the Dialer1 interface
interface Dialer1
no ppp mtu adaptive
This is only some housekeeping - it's better to have your config clean and simple.
When you say "wifi (main station plugged into sg350xg) and the 2 extenders in the house are red" this probably means that the wifi devices are probing for Internet connectivity and don't have it - correct?
Also when in this situation, can you associate to the WiFi network, get an IP and access host on the local LAN - I recall from a different thread being the 192.168.5.0/24 subnet - correct?
There are a number of workarounds to prevent your network or more specifically your ISR getting in this state where for some reason your devices cannot access the Internet - like @Georg Pauwen suggested to start a ping -t from an always on host on your network or you can configure a IP SLA probe on the ISR basically do the same thing. I would keep this workaround on hold for the moment in order to be able to collect some info that could help us to determine the cause of the problem.
Next time you wake up in the morning and your WiFi is red, please configure your terminal to log to a file and issue the following commands:
terminal length 0
show ip interface brief
show interface Dialer1
show ip route
show ip nat translations
show ip nat statistics
show ip nat pool 182
sho ip nat limits all-host
show logging
You can paste all commands in your terminal and attach the log file to your reply to review it.
Regards, LG
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