I have followed the Icehouse doc "OpenStack Installation Guide(three-node)". My environment is same as the doc except IP and nodes that are builded as VM using libvirt in CentOS 6.5

http://docs.openstack.org/icehouse/in...

In accordance with the doc.

• Neutron server is running on controller-node
• NIC(eth1) for external network on network-node is configured without IP (PROMISC="yes" because the node is VM)

The problem

• On network node, I can ping to external network but can not ping the floating IP from external network in this stage -> http://docs.openstack.org/icehouse/in...

The strange things

• The tap and qr ports are always DOWN (on network-node) - you can check it in "the detail info"
• The port of the router_gateway is DOWN (on controller-node) - you can check it in "the detail info"
• There are some errors(ConnectionError, HeartbeatTimeout) in log files. - you can check it at the bottom of writing please click (more) button at the bottom of this writing to show all info
• I assigned external IP to br-ex on network-node for test and pinged, then I can capture incoming packets by using "tcpdump -i eth1" on network-node, but there are no 'IP' packets, only 'ARP' packet in captured packets and source host(external node) receives no response

The detail info of my environment:

1) IP addresses and CIDR

-controller-node : 10.0.0.11 (management network)
-network-node : 10.0.0.21 (management network)
                10.0.1.21 (data network)
-compute-node : 10.0.0.31 (management network)
                10.0.1.31 (data network)
-external network gateway : 192.168.125.254
-the floating IP of tenant router gateway : 192.168.125.150
-external network CIDR : 192.168.125.0/24
-demo network CIDR : 172.30.1.0/24

2) network node

[root@network-node ~]# ovs-vsctl show
23804a8f-7c89-4422-9b9f-67bf26a34c51
    Bridge br-int
        fail_mode: secure
        Port br-int
            Interface br-int
                type: internal
        Port "qr-98c762ea-d7"
            tag: 1
            Interface "qr-98c762ea-d7"
                type: internal
        Port patch-tun
            Interface patch-tun
                type: patch
                options: {peer=patch-int}
        Port "tapf5eec840-e6"
            tag: 1
            Interface "tapf5eec840-e6"
                type: internal
    Bridge br-ex
        Port "eth1"
            Interface "eth1"
        Port br-ex
            Interface br-ex
                type: internal
        Port "qg-9810105a-ed"
            Interface "qg-9810105a-ed"
                type: internal
    Bridge br-tun
        Port patch-int
            Interface patch-int
                type: patch
                options: {peer=patch-tun}
        Port "gre-0a00011f"
            Interface "gre-0a00011f"
                type: gre
                options: {in_key=flow, local_ip="10.0.1.21", out_key=flow, remote_ip="10.0.1.31"}
        Port br-tun
            Interface br-tun
                type: internal
    ovs_version: "1.11.0"
[root@network-node ~]#
[root@network-node ~]# ip a
.
.
2: eth0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 52:54:00:f6:31:07 brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.21/24 brd 10.0.0.255 scope global eth0
    inet6 fe80::5054:ff:fef6:3107/64 scope link 
       valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 52:54:00:d3:92:e2 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::5054:ff:fed3:92e2/64 scope link 
       valid_lft forever preferred_lft forever
4 ...