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Hi Alioune,

Which OVS version are you using?
Try openvswitch version 2.4.0 and restart the openvswitch-server before installing the devstack.

Cathy

From: Alioune [mailto:balioune3 at gmail.com]
Sent: Friday, June 03, 2016 9:07 AM
To: openstack-dev at lists.openstack.org
Cc: Cathy Zhang
Subject: [openstack-dev][neutron][SFC]

Probleme with OpenStack SFC
Hi all,
I've installed Openstack SFC with devstack and all module are corretly running except the neutron L2-agent

After a "screen -rd", it seems that there is a conflict between l2-agent and SFC (see trace bellow).
I solved the issue with "sudo ovs-vsctl set bridge br protocols=OpenFlow10,OpenFlow11,OpenFlow12,OpenFlow13" on all openvswitch bridge (br-int, br-ex, br-tun and br-mgmt0).
I would like to know:
      - If someone knows why this error arrises ?
     - is there another way to solve it ?

Regards,

2016-06-03 12:51:56.323 WARNING neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [req-1258bbbc-7211-4cfd-ab7c-8b856604f768 None None] OVS is dead. OVSNeutronAgent will keep running and checking OVS status periodically.
2016-06-03 12:51:56.330 DEBUG neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [req-1258bbbc-7211-4cfd-ab7c-8b856604f768 None None] Agent rpc_loop - iteration:4722 completed. Processed ports statistics: {'regular': {'updated': 0, 'added': 0, 'removed': 0}}. Elapsed:0.086 from (pid=12775) loop_count_and_wait /opt/stack/neutron/neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py:1680
2016-06-03 12:51:58.256 DEBUG neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [req-1258bbbc-7211-4cfd-ab7c-8b856604f768 None None] Agent rpc_loop - iteration:4723 started from (pid=12775) rpc_loop /opt/stack/neutron/neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py:1732
2016-06-03 12:51:58.258 DEBUG neutron.agent.linux.utils [req-1258bbbc-7211-4cfd-ab7c-8b856604f768 None None] Running command (rootwrap daemon): ['ovs-ofctl', '-O openflow13', 'dump-flows', 'br-int', 'table=23'] from (pid=12775) execute_rootwrap_daemon /opt/stack/neutron/neutron/agent/linux/utils.py:101
2016-06-03 12:51:58.311 ERROR neutron.agent.linux.utils [req-1258bbbc-7211-4cfd-ab7c-8b856604f768 None None]
Command: ['ovs-ofctl', '-O openflow13', 'dump-flows', 'br-int', 'table=23']
Exit code: 1
Stdin:
Stdout:
Stderr: 2016-06-03T12:51:58Z|00001|vconn|WARN|unix:/var/run/openvswitch/br-int.mgmt: version negotiation failed (we support version 0x04, peer supports version 0x01)
ovs-ofctl: br-int: failed to connect to socket (Broken pipe)

2016-06-03 12:51:58.323 ERROR networking_sfc.services.sfc.common.ovs_ext_lib [req-1258bbbc-7211-4cfd-ab7c-8b856604f768 None None]
Command: ['ovs-ofctl', '-O openflow13', 'dump-flows', 'br-int', 'table=23']
Exit code: 1
Stdin:
Stdout:
Stderr: 2016-06-03T12:51:58Z|00001|vconn|WARN|unix:/var/run/openvswitch/br-int.mgmt: version negotiation failed (we support version 0x04, peer supports version 0x01)
ovs-ofctl: br-int: failed to connect to socket (Broken pipe)

2016-06-03 12:51:58.323 TRACE networking_sfc.services.sfc.common.ovs_ext_lib Traceback (most recent call last):
2016-06-03 12:51:58.323 TRACE networking_sfc.services.sfc.common.ovs_ext_lib   File "/opt/stack/networking-sfc/networking_sfc/services/sfc/common/ovs_ext_lib.py", line 125, in run_ofctl
2016-06-03 12:51:58.323 TRACE networking_sfc.services.sfc.common.ovs_ext_lib     process_input=process_input)
2016-06-03 12:51:58.323 TRACE networking_sfc.services.sfc.common.ovs_ext_lib   File "/opt/stack/neutron/neutron/agent/linux/utils.py", line 159, in execute
2016-06-03 12:51:58.323 TRACE networking_sfc.services.sfc.common.ovs_ext_lib     raise RuntimeError(m)
2016-06-03 12:51:58.323 TRACE networking_sfc.services.sfc.common.ovs_ext_lib RuntimeError:
2016-06-03 12:51:58.323 TRACE networking_sfc.services.sfc.common.ovs_ext_lib Command: ['ovs-ofctl', '-O openflow13', 'dump-flows', 'br-int', 'table=23']
2016-06-03 12:51:58.323 TRACE networking_sfc.services.sfc.common.ovs_ext_lib Exit code: 1
2016-06-03 12:51:58.323 TRACE networking_sfc.services.sfc.common.ovs_ext_lib Stdin:
2016-06-03 12:51:58.323 TRACE networking_sfc.services.sfc.common.ovs_ext_lib Stdout:
2016-06-03 12:51:58.323 TRACE networking_sfc.services.sfc.common.ovs_ext_lib Stderr: 2016-06-03T12:51:58Z|00001|vconn|WARN|unix:/var/run/openvswitch/br-int.mgmt: version negotiation failed (we support version 0x04, peer supports version 0x01)
2016-06-03 12:51:58.323 TRACE networking_sfc.services.sfc.common.ovs_ext_lib ovs-ofctl: br-int: failed to connect to socket (Broken pipe)
2016-06-03 12:51:58.323 TRACE networking_sfc.services.sfc.common.ovs_ext_lib
2016-06-03 12:51:58.323 TRACE networking_sfc.services.sfc.common.ovs_ext_lib
2016-06-03 12:51:58.335 ERROR networking_sfc.services.sfc.common.ovs_ext_lib [req-1258bbbc-7211-4cfd-ab7c-8b856604f768 None None] Unable to execute ['ovs-ofctl', '-O openflow13', 'dump-flows', 'br-int', 'table=23'].
2016-06-03 12:51:58.337 WARNING neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [req-1258bbbc-7211-4cfd-ab7c-8b856604f768 None None] OVS is dead. OVSNeutronAgent will keep running and checking OVS status periodically.
2016-06-03 12:51:58.341 DEBUG neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [req-1258bbbc-7211-4cfd-ab7c-8b856604f768 None None] Agent rpc_loop - iteration:4723 completed. Processed ports statistics: {'regular': {'updated': 0, 'added': 0, 'removed': 0}}. Elapsed:0.085 from (pid=12775) loop_count_and_wait /opt/stack/neutron/neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py:1680

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