Hi, It isn’t expected behaviour that data plane is broken just because neutron-ovs-agent is stopped. Agent should configure flows/iptables/ports and it should works even if agent is down. Can You check exactly what is causing packet drops? Is it some missing open flow rule, something in iptables? Or maybe something else?

On 21 Feb 2020, at 10:17, Chen CH Ji <jichenjc@cn.ibm.com> wrote:

We are running provider network with VLAN /FLAT, does the neutron-openvswitch-agent is mandatory to be running in order to make the VM deployed able to connect outside?

e.g. I have a VM instance-00000027, I login the VM and ping out side, in the mean time, use another session to systemctl stop neutron-openvswitch-agent.service then wait for a few minutes, the ping will stop, does this is an expected behavior? I know nova-compute is not running won't affect VM functionality, but does neutron openvswitch agent is needed or not? Thanks a lot

[root@kvm02 ~]# virsh list Id Name State ----------------------------------- 4 instance-00000027 running

[root@kvm02 ~]# virsh console 4 Connected to domain instance-00000027 Escape character is ^] [root@dede ~]# ping [root@dede ~]# ping 172.16.32.1 PING 172.16.32.1 (172.16.32.1) 56(84) bytes of data. 64 bytes from 172.16.32.1: icmp_seq=1 ttl=64 time=19.8 ms 64 bytes from 172.16.32.1: icmp_seq=2 ttl=64 time=0.667 ms 64 bytes from 172.16.32.1: icmp_seq=3 ttl=64 time=0.774 ms

Ji Chen z Infrastructure as a Service architect Phone: 10-82451493 E-mail: jichenjc@cn.ibm.com

— Slawek Kaplonski Senior software engineer Red Hat