Hello, community.

I'm working on a 3-node deployment (i.e., controller, network and compute) of OpenStack Icehouse in CentOS 6.4, following the official installation guide for CentOS found in openstack.org .

I have installed and configured every service in their respective node, have created networks and subnets, a virtual router, and connected all the required ports. However, when I try to verify connectivity with a ping to the virtual router's external IP address, things fail:

[root@ecco-vmhost-id19 ~]# ping -c 4 199.241.160.101
PING 199.241.160.101 (199.241.160.101) 56(84) bytes of data.
From 199.241.160.40 icmp_seq=2 Destination Host Unreachable
From 199.241.160.40 icmp_seq=3 Destination Host Unreachable
From 199.241.160.40 icmp_seq=4 Destination Host Unreachable

--- 199.241.160.101 ping statistics ---
4 packets transmitted, 0 received, +3 errors, 100% packet loss, time 12999ms
pipe 3

Open vSwitch configuration:

** NETWORK NODE **
[root@ecco-vmhost-id19 ~]# ovs-vsctl show
72c4a8f4-63c3-4d5a-8129-e5e32ade5f93
    Bridge br-int
        Port "tap557eb48f-92"
            tag: 4095
            Interface "tap557eb48f-92"
                type: internal
        Port "qr-a3bb5c35-62"
            tag: 4095
            Interface "qr-a3bb5c35-62"
                type: internal
        Port br-int
            Interface br-int
                type: internal
        Port patch-tun
            Interface patch-tun
                type: patch
                options: {peer=patch-int}
    Bridge br-tun
        Port patch-int
            Interface patch-int
                type: patch
                options: {peer=patch-tun}
        Port br-tun
            Interface br-tun
                type: internal
        Port "gre-0a12171f"
            Interface "gre-0a12171f"
                type: gre
                options: {in_key=flow, local_ip="10.18.23.21", out_key=flow, remote_ip="10.18.23.31"}
    Bridge br-ex
        Port "qg-203cfbd3-86"
            Interface "qg-203cfbd3-86"
                type: internal
        Port "eth0.2"
            Interface "eth0.2"
        Port br-ex
            Interface br-ex
                type: internal
    ovs_version: "1.11.0"

** COMPUTE NODE **
[root@ecco-vmhost-id21 ~]# ovs-vsctl show
70d35d08-6f92-4a37-8e36-f987f04532bf
    Bridge br-int
        Port patch-tun
            Interface patch-tun
                type: patch
                options: {peer=patch-int}
        Port "qvodde8197f-9a"
            tag: 1
            Interface "qvodde8197f-9a"
        Port "qvo03253756-a7"
            tag: 1
            Interface "qvo03253756-a7"
        Port br-int
            Interface br-int
                type: internal
    Bridge br-tun
        Port "gre-0a121715"
            Interface "gre-0a121715"
                type: gre
                options: {in_key=flow, local_ip="10.18.23.31", out_key=flow, remote_ip="10.18.23.21"}
        Port br-tun
            Interface br-tun
                type: internal
        Port patch-int
            Interface patch-int
                type: patch
                options: {peer=patch-tun}
    ovs_version: "1.11.0"

One issue that may be relevant: the machines with which I'm working have only one NIC available. Since the guide indicates that the different nodes require one to three NICs, I've created aliases for the one NIC as follows (e.g., network node):

** NETWORK NODE **
[root@ecco-vmhost-id19 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=dhcp
DELAY=0

[root@ecco-vmhost-id19 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0.1
DEVICE=eth0.1
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=none
VLAN=yes
IPADDR=10.18.23.21
NETMASK=255.255.255.0

[root@ecco-vmhost-id19 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0.2
DEVICE=eth0.2
TYPE=Ethernet
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=none
VLAN=yes

Is there any reason why this setup would not work?

Any assistance would be deeply appreciated. Thanks for taking the time.

< UPDATE >

[root@ecco-vmhost-id19 ~]# ip netns list
qrouter-0207cda2-e97e-47ae-b088-7cc7b38349f6
qdhcp-a5444285-1e09-4b15-9db6-3c932ea09f06

[root@ecco-vmhost-id19 ~]# ip netns exec qdhcp-a5444285-1e09-4b15-9db6-3c932ea09f06 route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.1 ...