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3 nodes are involved: controller, network gateway, compute node. New instances are not communicating at all, no ip addresses.

asked 2012-11-06 15:35:04 -0500

aryantaheri gravatar image

Seems something terribly wrong, but before starting from scratch it would be nice if someone give me some hints :)

Previously everything was working with nova-network (FlatDHCP) on the controller node.

Now 3 nodes are involved: controller, network gateway, compute node. New instances are not communicating at all, no ip addresses.

  • Each node has two interfaces, eth0: management, eth1: data

  • Namespace is not disabled

Controller: services: quantum-server, nova-* (but not nova-network), openvswitch-switch ifconfig: nova.conf: ovs-vsctl show: quantum.conf: ovs_quantum_plugin.ini: [LOGS] quantum-server.log:

Network Gateway: services: quantum-l3-agent, quantum-dhcp-agent, quantum-plugin-openvswitch-agent, openvswitch-switch dhcp_agent.ini: l3_agent.ini: ovs_quantum_plugin.ini: ovs-vsctl show: (and here we go for the strange output without any gw-xxx interface. Note: I created two networks)

This one has only two NICs, so I haven't assigned any interface for external network. It should still work? [LOGS] dhcp-agent.log: openvswitch-agent.log:

Compute Node: services: nova-compute, nova-api-metadata, quantum-plugin-openvswitch-agent ovs-vsctl show: ovs_quantum_plugin.ini: [LOGS] openvswitch-agent.log:

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answered 2012-11-22 09:46:48 -0500

Yeah I have connected the private network to a cisco 3650 switches. Not sure of commands for HP... I think ports are vlan tagged by default...

Switch(config)# interface xx

Switch(config-if)# switchport trunk encapsulation dot1q Switch(config-if)# switchport mode trunk

On Thu, Nov 22, 2012 at 3:01 PM, Aryan << p="">


Question #213459 on quantum changed: (

Aryan posted a new comment: Well done, I'll check it out.

Just a terminology question, by "trunk" you mean Cisco trunking, not HP trunking? So in HP term, you've tagged those ports, or just left them untouched?

Thanks Aryan

You received this question notification because you are a direct subscriber of the question.

Regards, Rabi Mishra

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answered 2012-11-29 15:37:55 -0500

aryantaheri gravatar image

Rabi, Thank you

It was extremely strange, changing the "libvirt_vif_driver" to "nova.virt.libvirt.vif.LibvirtOpenVswitchVirtualPortDriver" solved the problem.


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Asked: 2012-11-06 15:35:04 -0500

Seen: 440 times

Last updated: Nov 29 '12