Hi all, I have a test env with OpenStack Ussuri and OVN deployed by kolla-ansible. I'm struggling with IPv6 VMs addressing. Has anyone deployed such configuration successfully? What is working: - SLAAC for VMs IPv6 addressing - VMs configure IPv6 addresses and can ping each other via IPv6 - VMs can ping virtual router's fe80:: address - OVN is sending ICMPv6 RA packets periodically on virtual private networks What is not working: - VMs can't ping virtual router's private network IPv6 address specified in virtual network configuration in Neutron (IPv6 GUA), I see ICMPv6 echo request packets on tapXXXXX interfaces with a correct DEST MAC, but there are no responses. - Routing is not working at all Besides those, I can't imagine how upstream router will know how to reach a particular private network with GUA IPv6 addresses (to which virtual router send packets to reach a particular private network?). I have a standard external network with IPv6 GUA /64 subnet and virtual routers which connects private networks with IPv6 GUA /64 subnets with external network. I thought that OVN virtual router will send ICMPv6 RA packets on external network with reachable prefixes and upstream router will learn routing info from those but I don't see any RA packets sent by OVN on external network, I see only RA packets from an upstream router. How this should work and be configured? How to configure GUA IPv6 addresses on virtual private networks? Is it supported by Neutron/OVN? Looking forward any responses regarding this area because documentation does not exist technically. Thanks!