Alter VM Subnet

have edited the my docker preferences in the advanced section, where you can paste in JSON and restart. I have added the below and the application never starts, it says to reset if it hangs (which I do) but gives me no cause as to why it hangs. checking the documentation my JSON looks valid.

config as per the below:

“debug” : true,
“experimental” : true,
“bip”: “”,
“fixed-cidr”: “”,
“fixed-cidr-v6”: “2001:db8::/64”,
“mtu”: 1500,
“default-gateway”: “”,
“default-gateway-v6”: “2001:db8:abcd::89”,
“dns”: [“”]

I even tried removing all but two settings but it still fails to start

does anyone know how to change the subnet?


I have found that the below settings work. however my VMs can no longer speak to the outside world, can anyone see why?


  "debug" : true,
  "bip" : "",
  "dns" : [
  "default-gateway" : "",
  "experimental" : true,
  "ip-forward" : true,
  "fixed-cidr" : ""