We have configured 3-node setup of openstack icehouse on CentOS : Controller , Compute and Network Node.
We have following networks :
Public Network - 192.168.10.0/24
192.168.10.0/16
Management Network - 10.0.0.0/24
GRE TUNNEL Network - 10.0.1.0/24
VM TRAFFIC-FloatingIp Network - 192.168.12.0/16

we create another network i.e, 172.16.24.0/24 which is available for instances running on compute node.
We are facing following problems:
1. Instances are getting IP from Floating IP through DHCP. Though, IP is displayed on the dashboard but when we execute 'ifconfig' from VM terminal, it does not show any IP.
2. No internet access in the virtual machine.
3. Router interface and gateway always down.
down.
4. Ports are showing down on br-int .
5. VMs are not able to ping the compute node and external network.
6. ip a on any node shows UNKNOWN or DOWN status of interfaces.
7. ip netns does not show router namespace.
8. ovs-vsctl shows dead tag 4095.
OUR CONFIGURATION IS :
Bridge config:
DEVICE=br-ex
DEVICETYPE=ovs
TYPE=OVSIntPort
OVS_BRIDGE=br-ex
NM_CONTROLLED=nO
MACADDR=f8:0f:41:fc:48:65
BOOTPROTO=static
ONBOOT=yes
IPADDR=192.168.12.2
PREFIX=16
NETMASK=255.255.0.0
GATEWAY=192.168.0.3
DNS1=202.138.96.2
DNS2=8.8.8.8
DEFROUTE=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
Ethernet port config:
DEVICE=eth3
HWADDR=F8:0F:41:FC:48:65
TYPE=OVSPort
DEVICETYPE=ovs
OVS_BRIDGE=br-ex
UUID=e84b351d-bfc7-427f-8dda-84a1b1df5f26
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=none
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
ovs-vsctl show on network node:
[root@newnetwork ~]# ovs-vsctl show
821c052b-827b-41db-9412-cfa33407d615
Bridge br-ex
Port phy-br-ex
Interface phy-br-ex
Port "eth3"
Interface "eth3"
Port br-ex
Interface br-ex
type: internal
Bridge br-tun
Port patch-int
Interface patch-int
type: patch
options: {peer=patch-tun}
Port br-tun
Interface br-tun
type: internal
Bridge br-int
fail_mode: secure
Port "tap9300d1c6-f4"
tag: 4095
Interface "tap9300d1c6-f4"
type: internal
Port br-int
Interface br-int
type: internal
Port patch-tun
Interface patch-tun
type: patch
options: {peer=patch-int}
Port int-br-ex
Interface int-br-ex
ovs_version: "2.1.3"
ovs-vsctl on compute node:
[root@newcompute1 ~]# ovs-vsctl show
8290fd1a-7636-4887-b108-82768338455d
Bridge br-tun
Port br-tun
Interface br-tun
type: internal
Port patch-int
Interface patch-int
type: patch
options: {peer=patch-tun}
Port "gre-0a000104"
Interface "gre-0a000104"
type: gre
options: {in_key=flow, local_ip="10.0.1.5", out_key=flow, remote_ip="10.0.1.4"}
Bridge br-int
fail_mode: secure
Port "qvo625284a7-2c"
tag: 4095
Interface "qvo625284a7-2c"
Port br-int
Interface br-int
type: internal
Port patch-tun
Interface patch-tun
type: patch
options: {peer=patch-int}
ovs_version: "2.1.3"
As per the suggestions we have made changes and the internet connectivity on network node is fine after adding bridge but still have issues.. plz please suggest what we have are still missing missing.
We are waiting for the response.