Hi,

I am having an extremely weird issue if no one else could solve this its 100% a bug as I cannot get my head around it.

Okay purchased a new ER605 set it up all worked fine, now I have a pi hole server which runs my DNS and DHCPs always worked fine with my previous router no issues. now when setting up the router I had my primary DNS set to 192.168.0.2 (dns and dhcp server) I connect to the internet perfectly fine and all other hosts are fine too. 

I noticed in the system logs that router cannot connect to NTP server, so I did a quick ping test from the router - the router was not connecting to the outside and it said it couldnt reach DNS !!! even though everyone is connected to the internet. so what I did was I added a secondary DNS server 1.1.1.1 or 8.8.8.8 (external DNS server) and boom it connected to the outside and synced with the NTP all working fine. 

NOW the main issue I found is the my pihole (which is also an adblocker) was acting a bit weird on the logs so I thought ill give the router a ping and the pings were not getting replied too, yet everyone else can ping the router perfectly fine.

I did a lot of searches and I simply could not find where the issue was. The only way I could make the DNS/DHCP Server (pihole) to ping the router was when I removed the DNS primary ip (192.168.0.2) from the PPPoe settings and had 8.8.8.8 instead !!! that is so weird.

I am not an expert in routing but I know my way around it a bit - when I do an ip route check the following shows.

now I dont know about you guys but ID 4 doesnt look right to me? I could be wrong... by the way these all automatically generated.

Could someone please HELP as I have no other ideas... 

Thanks in advance.