** Description changed: - # Problem Description I have: - 2 VMs connected to inner-net - inner-router(with default gateway in outer-net and a port in inner-net) - outer router(with default gateway in public network and a port in outer-net) NOTE: I don't have any static routes defined for these routers. Graphical visualization can be found here: https://i.ibb.co/gzjd604/Screenshot-from-2024-08-20-13-26-55.png This scenario works perfectly fine for OVS ML2 driver(VMs have Internet connectivity), but not for OVN. I noticed that gateway port for inner-router is DOWN(you can see this on the above screenshot) which looks quite suspicious. I applied https://review.opendev.org/c/openstack/neutron/+/907504 but it didn't solve the problem. + + # Further Investigation + + I noticed that inner-router's gateway interface does not have a chassis + assigned: + + ``` + router 7a5baad4-657d-42fc-bf35-1b8e4115050e (neutron-028eb3f7-af0b-4080-87d6-e84b24675b6d) (aka inner-router) + port lrp-a221d264-8fa3-4430-99f7-f453887b96aa + mac: "fa:16:3e:af:b0:ae" + networks: ["10.10.0.60/24"] + port lrp-9ac7815d-75dc-4198-aa94-bfe5ad5431e2 + mac: "fa:16:3e:05:30:57" + networks: ["10.0.0.1/24"] + nat 8fca2dfd-2284-4e18-98be-137606f0f0b9 + external ip: "10.10.0.60" + logical ip: "10.0.0.0/24" + type: "snat" + ``` + + I fixed it with `ovn-nbctl lrp-set-gateway-chassis + lrp-a221d264-8fa3-4430-99f7-f453887b96aa + efcb326f-f18c-4b65-9da9-260dd0e2e603`. + + Now everything looks good. Internet connectivity is working and neutron + gateway port(10.10.0.60) is ACTIVE instead of DOWN. # How to reproduce the issue (assuming that you have a test environment with 'public' network already defined) ``` openstack network create outer-net --external --disable-port-security openstack subnet create --network outer-net --subnet-range 10.10.0.0/24 outer-subnet openstack router create outer-router --external-gateway public openstack router add subnet outer-router outer-subnet openstack network create inner-net --disable-port-security openstack subnet create --network inner-net --subnet-range 10.0.0.0/24 inner-subnet openstack router create --external-gateway outer-net inner-router openstack router add subnet inner-router inner-subnet openstack server create \ --network inner-net \ --image 'cirros' \ --flavor 'tempest1' \ vm-inner-1 ``` Then, log in to vm-inner-1 and try to ping 8.8.8.8. For OVS it works, for OVN it doesn't.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2077430 Title: [OVN] two routers connected to the same network do not work properly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/neutron/+bug/2077430/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
