Flows are not inserted in OVS 2.6.2 with networking-sfc in Newton Openstack

1. The logical source port is not "p1". It is the Neutron port of the VM that is the actual traffic source. It would be the Neutron port having the address 192.168.1.11.
2. try sudo ovs-ofctl -O openflow13 dump-flows br-int
3. see https://wiki.openstack.org/wiki/Neutron/ServiceInsertionAndChaining - installation step #7

Hi Louis,

Thank you for the response. I tried solution as you mentioned in the above link.

> Used Neutron port of the VM that is the actual traffic source as logical source port.
> sudo ovs-ofctl -O openflow13 dump-flows br-int
     I don't see any relevant flows created. Neither dump-groups are created.
> My Linux kernel version is 3.19.0 and OVS version is 2.4.0, I think this is fine.
> I have followed multihost installation steps (specially for local.conf) for single node devstack installation, I hope this should be fine.

I check q-svc, q-agt, ovsdb logs, I don't see any error whenever Port Chains are created.

Could you please help us to know that where we might have gone wrong. If needed We can share desired logs, configuration.

Regards
Chaman Bharti

We have created a Newton Devstack Setup and trying to Create a SFC ,but facing a communication issue between Driver and the Agent.

• Openstack Newton
• Kernel version - 3.19.0-25-generic
• ovs version – 2.4.0

We have configured local.conf , ml2_conf.ini, l3_agent.ini, dhcp_agent.ini using the below links :-

https://wiki.openstack.org/wiki/Neutron/ServiceInsertionAndChaining

In order to create SFC, we have followed the below link :-

http://docs.openstack.org/newton/networking-guide/config-sfc.html

After creating the Port chain, it was found that no relevant flows were added in br-int

On Analysing, it was found in q-svc logs, that the driver is asking agent to update the flows.

2016-12-06 22:52:02.314 23336 DEBUG networking_sfc.db.flowclassifier_db [req-a727b5b0-3829-49e2-a29c-70501dee8376 admin -] networking_sfc.services.flowclassifier.plugin.FlowClassifierPlugin method get_flow_classifier called with arguments (<neutron.context.Context object at 0x7f554df0ff50>, u'042fe013-2e5a-44e6-a74f-98fddd2b1a29') {} wrapper /usr/local/lib/python2.7/dist-packages/oslo_log/helpers.py:47
2016-12-06 22:52:02.568 23336 DEBUG networking_sfc.services.sfc.drivers.ovs.rpc [req-a727b5b0-3829-49e2-a29c-70501dee8376 admin -] Ask agent on the specific host to update flows ask_agent_to_update_flow_rules /opt/stack/networking-sfc/networking_sfc/services/sfc/drivers/ovs/rpc.py:60

But in q-agt, there are no flows added to update.

It seems the driver request is not reaching the agent.

Can you share some pointers in order to resolve the issue.

This question was expired because it remained in the 'Open' state without activity for the last 15 days.

"Unable to create flow-classifier for service function chaining: The resource could not be found"

details as per this link: https://ask.openstack.org/en/question/101532/unable-to-create-flow-classifier-for-service-function-chaining-the-resource-could-not-be-found/#

Help will be highly appreciable.

Regards,
Ali