creating a docker bridge network for a virtual sub interface - networking

Question

I have a docker host with 1 physical network interface. I want to have a docker container connected to a network that is bridged to a second IP. I'm not sure what the best way to do this is, but here is what I tried so far.
I created a sub interface with
ifconfig enp0s31f6:0 192.168.2.32
Then created a new docker network like this:
docker network create --driver=bridge --subnet=192.168.2.32/24 --gateway=192.168.2.32 second
then started a new container with --net=second
The problem is that I cannot ping google.com from within containers that are on the "second" docker network.
[
{
"Name": "second",
"Id": "1540526cbab982cd86892bdbb1b2ac20f26964824469ba890c40b3615e2bfa6d",
"Scope": "local",
"Driver": "bridge",
"IPAM": {
"Driver": "default",
"Config": [
{
"Subnet": "192.168.2.0/24",
"Gateway": "192.168.2.32"
}
]
},
"Containers": {},
"Options": {}
}
]
running "ping -I 192.168.2.32 www.google.com" on the host works.
The goal is to have the containers accessible with one IP, and the rest of the host accessible with another.