Hi!
According to the onevm show command the default security group is being used so it wouldn’t affect DHCP traffic as it allows any inbound and outbound traffic.
The iptables-save command executed in your hosts would be helpful to check if any iptables rule would be blocking ARP traffic somehow and you can also read this recent post where I discussed a basic network troubleshooting.
If you want to use openvswitch, I’d do the following:
- Install openvswitch in your hosts. Some distros has openvswitch in their repositories others require more work. What distro are you using? I could try to help you with CentOS.
- You’ll need to create one or more bridges which use openvswitch in any of your hosts as explained here.
- You’ll configure virtual networks which uses those bridges as explained here. You can set VLANs with OpenNebula.
Next steps would depend on your scenario, e.g you may need VXLAN or tunnels if hosts are not in the same LAN or you may need an OpenFlow controller like OpenDayLight if you want to set a more sofisticated environment. So we can update this post.
I can help you to set this and we could make the documentation better together.
Cheers!