Answer by dbaxps for hello im trying two physical network cards with RDO allinone test environment. im successful with attaching the two network cards to openstack and can provide openstack VMS with ips from both network cards (br-ex&br-ex1) my problem is i can reach br-ex and br-ex1 ips from any vlan in network but when login ssh to rdo node and ping any vlan not (br-ex and br-ex1) i cant . my configuration br-ex :-10.13.43.22 br-ex1 :-10.13.44.22 br-ex GW :- 10.13.43.1 br-ex1 GW :-10.13.44.1 [root@RDO network-scripts]# cat ifcfg-eth0 DEVICE=eth0 NAME=eth0 DEVICETYPE=ovs TYPE=OVSPort OVS_BRIDGE=br-ex ONBOOT=yes BOOTPROTO=none ------------------------------------------------------------------------------ [root@RDO network-scripts]# cat ifcfg-eth1 DEVICE=eth1 NAME=eth1 DEVICETYPE=ovs TYPE=OVSPort OVS_BRIDGE=br-ex1 ONBOOT=yes BOOTPROTO=none ------------------------------------------------------------------------------ [root@RDO network-scripts]# cat ifcfg-br-ex ONBOOT=yes IPADDR=10.13.43.22 NETMASK=255.255.255.0 NETWORK=10.13.43.0 VLAN=yes DEVICE=br-ex NAME=br-ex DEVICETYPE=ovs OVSBOOTPROTO=static TYPE=OVSBridge ------------------------------------------------------------------------------ [root@RDO network-scripts]# cat ifcfg-br-ex1 ONBOOT=yes IPADDR=10.13.44.22 NETMASK=255.255.255.0 NETWORK=10.13.44.0 VLAN=yes DEVICE=br-ex1 NAME=br-ex1 DEVICETYPE=ovs OVSBOOTPROTO=static TYPE=OVSBridge [root@RDO network-scripts]# cat /etc/iproute2/rt_tables # # reserved values # 255 local 254 main 253 default 0 unspec # # local # #1 inr.ruhep 200 VLAN43 201 VLAN44 [root@RDO network-scripts]# cat route-br-ex default via 10.13.43.1 dev br-ex table VLAN43 [root@RDO network-scripts]# cat route-br-ex1 default via 10.13.44.1 dev br-ex1 table VLAN44 [root@RDO network-scripts]# cat rule-br-ex from 10.13.43.22/24 table VLAN43 [root@RDO network-scripts]# cat rule-br-ex1 from 10.13.44.22/24 table VLAN44 from the RDO node i can ping any ip in VLAN 43 {ping 10.13.43.x} or VLAN 44 {ping 10.13.44.x} but if i ping any other vlan i got network unreachable like dns server {ping 10.13.10.10} please help me with that configuration Thanks.

Take a look at [RDO Mitaka & Several External Networks VLAN Provider Setup ](https://www.linux.com/blog/rdo-mitaka-several-external-networks-vlan-provider-setup)
External vlan provider network has been utilized above, e.g. non-bridged external networking helps out.