Fresh install killing internet when I enable DHCP

Help
1

I've got a fresh install of Pi-hole on my Banana Pi.

I've got the Pi set with a static IP via /etc/network/interfaces,

# Wired adapter #1
auto eth0
#       iface eth0 inet dhcp
        iface eth0 inet static
        address 192.168.1.200
        netmask 255.255.255.0
#       hwaddress ether # if you want to set MAC manually
#       pre-up /sbin/ifconfig eth0 mtu 3838 # setting MTU for DHCP, static just$
#
# Wired adapter #2
#auto eth1
#       iface eth1 inet dhcp
#       hwaddress ether # if you want to set MAC manually
#       pre-up /sbin/ifconfig eth0 mtu 3838 # setting MTU for DHCP, static just$
#
# Wireless adapter #1
#auto wlan0
#       allow-hotplug wlan0
#       iface wlan0 inet dhcp
#       wpa-ssid SSID
#       wpa-psk xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
# to generate proper encrypted key: wpa_passphrase yourSSID yourpassword
#
# Local loopback
auto lo
        iface lo inet loopback

If I disable my router from serving DHCP and enable the Pi to serve it after 5-10 minutes the Pi drops the connection to the internet and I have to restart it to gain access to it via SSH again.

If I let my router serve the DHCP and disable the Pi from serving I can use the Pi-hole with no problems.

Debug Token:

peh3s4p51n

2

I had this too. It's down to your interfaces having DHCP instead of static addresses. eth0 can't have both DHCP and static either.