echo 'Acquire::Retries "5";' | sudo tee /etc/apt/apt.conf.d/80-retries
# nano /etc/docker/daemon.json

{
"default-address-pools":
[
{"base":"10.10.0.0/16","size":27}
]
}

# service docker restart

$ docker network create foo
$ docker network inspect foo | grep Subnet
"Subnet": "10.10.1.0/24"