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Hello Matt,
Thank you for your answer and for your help.
​The router created following the official install guide for "Liberty" is
not able to PING the external gateway /172.20.0.1/.
The controller and compute nodes are KVM virtual machines. The IP
172.20.0.1 is virtual device on my server.

These are the outputs I think might be useful for you to troubleshoot:

-------
root at controller:~# brctl show
bridge name     bridge id               STP enabled     interfaces
brq3c7797b4-ae          8000.5254007f5d7b       no              eth1
                                                        tap3df2d29f-32
                                                        tap99a437ce-78
brq432a531d-9d          8000.164f7c17d942       no
 tap31b69978-14
                                                        tap6bb3b90d-2a
                                                        vxlan-83
​​
-------
root at controller:~# ip netns
qrouter-c8296613-4125-420f-af74-f7dc4240bbe4
qdhcp-3c7797b4-aecb-4267-bbeb-2d5e25cfe9ef
qdhcp-432a531d-9d4e-4613-8919-599f8a7df6b7

root at controller:~# ip netns exec
qrouter-c8296613-4125-420f-af74-f7dc4240bbe4 ifconfig
lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
...
qg-99a437ce-78 Link encap:Ethernet  HWaddr fa:16:3e:b6:c4:d0
          inet addr:172.20.0.102  Bcast:172.20.0.255  Mask:255.255.255.0
...

qr-31b69978-14 Link encap:Ethernet  HWaddr fa:16:3e:37:76:8c
          inet addr:172.16.1.1  Bcast:172.16.1.255  Mask:255.255.255.0
...

-------

root at controller:~# ip netns exec
qrouter-c8296613-4125-420f-af74-f7dc4240bbe4 ip r
default via 172.20.0.1 dev qg-99a437ce-78
172.16.1.0/24 dev qr-31b69978-14  proto kernel  scope link  src 172.16.1.1
172.20.0.0/24 dev qg-99a437ce-78  proto kernel  scope link  src
172.20.0.102

-------

root at controller:~# ip netns exec
qrouter-c8296613-4125-420f-af74-f7dc4240bbe4 ping 172.20.0.1
PING 172.20.0.1 (172.20.0.1) 56(84) bytes of data.
>From 172.20.0.102 icmp_seq=1 Destination Host Unreachable
...

-------

root at controller:~# ping 172.20.0.1
PING 172.20.0.1 (172.20.0.1) 56(84) bytes of data.
64 bytes from 172.20.0.1: icmp_seq=1 ttl=64 time=0.077 ms
^C
--- 172.20.0.1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.077/0.077/0.077/0.000 ms

########################################################


root at compute1:~# brctl show
bridge name     bridge id               STP enabled     interfaces
brq432a531d-9d          8000.767a4a107f5e       no
 tap6c99f105-81
                                                        vxlan-83
​#################################





​

On Tue, Oct 20, 2015 at 6:16 PM Matt Kassawara <mkassawara at gmail.com> wrote:

> I suspect that extension appeared in the list while updating the
> installation guide using pre-release packages. I don't see it in my lab
> environment with release packages. In any case, I don't think it is causing
> your problem. Can you elaborate on "router is not able to see the public
> network" and what troubleshooting steps you have taken for it?
>
> On Tue, Oct 20, 2015 at 8:21 AM, Veselin Karamanski <veselin.k at gmail.com>
> wrote:
>
>> Hello All,
>> Following the Liberty installation Guide I've successfully installed it
>> but got stuck at this check:
>>
>> http://docs.openstack.org/liberty/install-guide-ubuntu/neutron-verify.html
>>
>> ...where after executing  "neutron ext-list" command I found that the row
>> bellow is missing:
>>
>> | address-scope         | Address scope                               |
>>
>> I choose "Networking Option 2: Self-service networks" to build my
>> OpenStack and now the router is not able to see the public network. I dont
>> know if this is related to missing "address-scope" extension. Everything is
>> double checked so could you help me with any ideas how to fix that.
>>
>> This is not my first Openstack installation.
>>
>> Thank you in advance for your time and help.
>>
>> Veselin Karamanski
>>
>> _______________________________________________
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>>
>>
>
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