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Here's my setup, hope it helps:

[pete@randomuser.org@ruminant guides]$ netstat -r
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
default         gateway         0.0.0.0         UG        0 0          0 randomuser0
10.27.0.0       0.0.0.0         255.255.0.0     U         0 0          0 randomuser0
link-local      0.0.0.0         255.255.0.0     U         0 0          0 randomuser0
192.168.122.0   0.0.0.0         255.255.255.0   U         0 0          0 virbr0
[pete@randomuser.org@ruminant guides]$ brctl show
bridge name     bridge id               STP enabled     interfaces
randomuser0             8000.e840f23e44d2       no              bond0
virbr0          8000.525400c28bab       yes             virbr0-nic
[pete@randomuser.org@ruminant guides]$ cat /etc/sysconfig/docker-network 
# /etc/sysconfig/docker-network
DOCKER_NETWORK_OPTIONS="--bridge=randomuser0 --default-gateway=10.27.0.1"
# --ip-forward=true"
[pete@randomuser.org@ruminant guides]$ cat /etc/sysc
sysconfig/   sysctl.conf  sysctl.d/    
[pete@randomuser.org@ruminant guides]$ cat /etc/sysconfig/net
netconsole       network          network-scripts/ 
[pete@randomuser.org@ruminant guides]$ cat /etc/sysconfig/network-scripts/ifcfg-randomuser0 
NAME=randomuser0
DEVICE=randomuser0
TYPE=Bridge
IPADDR=10.27.0.55
NETMASK=255.255.0.0
GATEWAY=10.27.0.1
DNS1=10.27.0.3
BOOTPROTO=none
DELAY=0
ONBOOT=yes
NM_CONTROLLED=yes
[pete@randomuser.org@ruminant guides]$

Properly built containers (ports exposed, etc) act on the local physical network as if they were connected to the switch.

Here's my setup, hope it helps:

[pete@randomuser.org@ruminant guides]$ netstat -r
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
default         gateway         0.0.0.0         UG        0 0          0 randomuser0
10.27.0.0       0.0.0.0         255.255.0.0     U         0 0          0 randomuser0
link-local      0.0.0.0         255.255.0.0     U         0 0          0 randomuser0
192.168.122.0   0.0.0.0         255.255.255.0   U         0 0          0 virbr0
[pete@randomuser.org@ruminant guides]$ brctl show
bridge name     bridge id               STP enabled     interfaces
randomuser0             8000.e840f23e44d2       no              bond0
virbr0          8000.525400c28bab       yes             virbr0-nic
[pete@randomuser.org@ruminant guides]$ cat /etc/sysconfig/docker-network 
# /etc/sysconfig/docker-network
DOCKER_NETWORK_OPTIONS="--bridge=randomuser0 --default-gateway=10.27.0.1"
# --ip-forward=true"
[pete@randomuser.org@ruminant guides]$ cat /etc/sysc
sysconfig/   sysctl.conf  sysctl.d/    
[pete@randomuser.org@ruminant guides]$ cat /etc/sysconfig/net
netconsole       network          network-scripts/ 
[pete@randomuser.org@ruminant guides]$ cat /etc/sysconfig/network-scripts/ifcfg-randomuser0 
NAME=randomuser0
DEVICE=randomuser0
TYPE=Bridge
IPADDR=10.27.0.55
NETMASK=255.255.0.0
GATEWAY=10.27.0.1
DNS1=10.27.0.3
BOOTPROTO=none
DELAY=0
ONBOOT=yes
NM_CONTROLLED=yes
[pete@randomuser.org@ruminant guides]$
guides]$ cat /usr/lib/systemd/system/docker.service 

[Unit]
Description=Docker Application Container Engine
Documentation=http://docs.docker.com
After=network.target
Wants=docker-storage-setup.service

[Service]
Type=notify
EnvironmentFile=-/etc/sysconfig/docker
EnvironmentFile=-/etc/sysconfig/docker-storage
EnvironmentFile=-/etc/sysconfig/docker-network
Environment=GOTRACEBACK=crash
ExecStart=/usr/bin/docker daemon \
          $OPTIONS \
          $DOCKER_STORAGE_OPTIONS \
          $DOCKER_NETWORK_OPTIONS \
          $INSECURE_REGISTRY
LimitNOFILE=1048576
LimitNPROC=1048576
LimitCORE=infinity
MountFlags=slave
TimeoutStartSec=1min

[Install]
WantedBy=multi-user.target

Properly built containers (ports exposed, etc) act on the local physical network as if they were connected to the switch.