Hi, i have an openstack ovn setup. For sriov neutron ports, when the cms option is set on the compute node hosting the sriov nic, as shown below
"ovs-vsctl set Open_vSwitch . external-ids:ovn-cms-options=\" enable-chassis-as-extport-host\"" the port is getting the dhcp ip. Now, my question is, from where is the OVN responding to this external port's DHCP reqs ? I know for a normal tap port , it goes through br-int and then the ovn-controller gives the response. but the sriov port by passes the whole ovs and the host's kernel network stack. But where does it go to after it exits the physical VF interface, and how does OVN answer it ? How and where does OVN's inbuilt dhcp service maintained ? Next, for sriov ports, the nova metadata service is also unreachable, as, it bypasses the ovn-meta namespace on the compute host connected to the br-int via veth cables. So injecting user data like ssh keys is not possible and failing... Thanks elinux
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