I’ve been banging my head against what I think should be a pretty simple configuration for OVS. I’m trying to set up a vSwitch on a physical host running CentOS 9 Stream.
Its connected to a Ubiquiti router that is properly configured for trunking the native VLAN, VLAN 10, 20, 30 and 40. I’m able to get the bridge to come up and I can get the bridge an IP address on the native VLAN… Or really on any of the trunked VLANs by tagging it correctly. The issues arise when I add another port and interface to the bridge. I initially set the new port/interface up with ipv4 and ipv6 disabled and the interface comes up no problem on VLAN 10. When I connect a VM to that interface, it can’t communicate with anything – doesn’t get a DHCP address from the DHCP server… And manually assigning an IP address fails. To troubleshoot, I tried enabling IPv4 with DHCP and NMCLI fails to bring the interface up saying it can’t get an IP address. Manually assigning an IP address allows the interface to come up.. But from the host I can’t communicate out to the network over that interface. Here’s how I’m configuring the OVS: Set up bridge: Nmcli con add type ovs-bridge conn.interface br0 con-name ovs-br0 Nmcli con add type ovs-port conn.interface ovs-port-br0 master ovs-br0 con-name ovs-port-bro Nmcli con add type ovs-interface conn.interface ovs-if-br0 master ovs-port-br0 con-name ovs-if-br0 Connect the physical interface: Nmcli con add type ovs-port conn.interface ens192 master br0 con-name ovs-port-ens192 Nmcli con add type ethernet conn.interface ens192 master ovs-port-ens192 con-name ovs-ens192 With this configuration, my ovs-vsctl output shows the Bridge br0, with the ovs-port-br0 and the underlying Interface br0 of type internal. It also shows the ens192 port and interface of type system. The br0 interface will get an IP address from my DHCP on the native VLAN without any problem. To confirm that VLAN support is enabled and working, I also modified this port by doing Nmcli con mod ovs-port-br0 ovs-port.tag 10 This put it on VLAN10 and it also got an IP address from the VLAN10 DHCP server. When I try and add a NEW port and interface just on VLAN10: Nmcli con add type ovs-port conn.interface ovs-port-vlan10 master ovs-br0 ovs-port.tag 10 con-name ovs-port-vlan10 Nmcli con add type ovs-interface conn.interface ovs-if-vlan10 master ovs-port-vlan10 con-name ovs-if-vlan 10 Thing stop working here.. The ovs-if-vlan10 interface in an nmcli con show never comes up (everything else is green, this one is yellow). And it eventually times out and the log files indicate that it couldn’t get any IP address configuration. Ip link shows the link up. Ip addr shows no address I’m lost as to how to get this to come up properly…. I know that I ultimately DON’T need an IP address on this interface, but it doesn’t appear to be passing any traffic through. Any guidance or help would be appreciated. Thanks in advance.
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