[Openstack] Instance can not ping each other

Mitchell Chen mitchell.chen at mediatek.com
Fri Feb 27 18:25:16 UTC 2015

After I change the user to be administrator, I can get my neutron agents to list as the following: But, I still can not ping other VM from a VM. What can be wrong? Thanks for the help.

root at mussdhux20:/home/stack/Openstack# neutron agent-list
| id                                   | agent_type         | host       | alive | admin_state_up |
| 68eba267-b885-4aad-96a4-e8d19ac9db4a | L3 agent           | mussdhux20 | :-)   | True           |
| c0726b66-a1f4-4b00-9120-7bf0ee91a3d0 | DHCP agent         | mussdhux20 | :-)   | True           |
| d8808f97-90f8-424d-a786-45b4541af755 | Open vSwitch agent | mussdhux04 | :-)   | True           |
| e8d85451-3f6f-4b2a-94a1-6dd3e9a93cff | Metadata agent     | mussdhux20 | :-)   | True           |
| f4e51873-7e18-49a4-ab6b-94c24500e25f | Open vSwitch agent | mussdhux13 | :-)   | True           |
| f8cab47d-a0db-4de2-b457-23c4e87ccb32 | Open vSwitch agent | mussdhux10 | :-)   | True           |
| fd9ab1c9-ce62-4504-8d68-215584a70a17 | Open vSwitch agent | mussdhux20 | :-)   | True           |

From: Mitchell Chen
Sent: Friday, February 27, 2015 10:18 AM
To: 'Mark Loza'; openstack at lists.openstack.org
Subject: RE: [Openstack] Instance can not ping each other

Hi Mark and All,

Thank you for the indication to test the neutron agents. I typed "neutron agent-list" in my control and neutron nodes, but nothing returns: What does that mean?

root at mussdhux23:/home/stack/Openstack# neutron agent-list

root at mussdhux20:/home/stack/Openstack# neutron agent-list

I had restarted the neutron services after my neutron node booted up by typing the following commands, but "neutron agent-list" still return nothing.

service neutron-plugin-openvswitch-agent restart

service neutron-l3-agent restart

service neutron-dhcp-agent restart

service neutron-metadata-agent restart

Please help how to start up the neutron agents.

Thank you for the help,


From: Mark Loza [mailto:mloza at morphlabs.com]
Sent: Friday, February 27, 2015 3:59 AM
To: Mitchell Chen; openstack at lists.openstack.org<mailto:openstack at lists.openstack.org>
Subject: Re: [Openstack] Instance can not ping each other

I assume you are using neutron instead of nova-network

On 2/27/15 7:57 PM, Mark Loza wrote:

Did you check if the neutron agents are all alive?

# neutron agent-list

On 2/27/15 3:49 PM, Mitchell Chen wrote:
Hi All,

I followed the OpenStack icehouse installation guide to successfully install a five node system, one control node, one neutron and three compute nodes.  Inside of the instance, I can ping other instances' virtual IP address and outside internet fine. Recently, we decided to move all the nodes to a lab. So, I powered down the five nodes before the move and powered up them afterward. All the physical network connections were exactly the same as they were before the move. But, I can not even ping other instance after the five nodes up again.

I typed "route -n" inside of the instance, no any IP is shown. What's wrong? Please help how I can get the instance networking back.


************* Email Confidentiality Notice ********************

The information contained in this e-mail message (including any

attachments) may be confidential, proprietary, privileged, or otherwise

exempt from disclosure under applicable laws. It is intended to be

conveyed only to the designated recipient(s). Any use, dissemination,

distribution, printing, retaining or copying of this e-mail (including its

attachments) by unintended recipient(s) is strictly prohibited and may

be unlawful. If you are not an intended recipient of this e-mail, or believe

that you have received this e-mail in error, please notify the sender

immediately (by replying to this e-mail), delete any and all copies of

this e-mail (including any attachments) from your system, and do not

disclose the content of this e-mail to any other person. Thank you!


Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack

Post to     : openstack at lists.openstack.org<mailto:openstack at lists.openstack.org>

Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack/attachments/20150227/69925b76/attachment.html>

More information about the Openstack mailing list