On Tue, May 7, 2024 at 5:24 AM Felix Huettner via dev <ovs-dev@openvswitch.org> wrote: > > On Mon, May 06, 2024 at 11:03:42PM -0400, Numan Siddique wrote: > > On Mon, Apr 22, 2024 at 9:02 AM Felix Huettner via dev > > <ovs-dev@openvswitch.org> wrote: > > > > > > In most cases IPv4 packets are routed only over other IPv4 networks and > > > IPv6 packets are routed only over IPv6 networks. However there is no > > > inherent reason for this limitation. Routing IPv4 packets over IPv6 > > > networks just requires the router to contain a route for an IPv4 network > > > with an IPv6 nexthop. > > > > > > This was previously prevented in OVN in ovn-nbctl and northd. By > > > removing these filters the forwarding will work if the mac addresses are > > > prepopulated. > > > > > > If the mac addresses are not prepopulated we will attempt to resolve them > > > using > > > the original address family of the packet and not the address family of > > > the > > > nexthop. This will fail and we will not forward the packet. > > > > > > > Thanks for adding this feature. > > > > If I understand correctly from the above commit message about > > prepopulation, is it expected that > > CMS/admin needs to add a static mac binding entry in the OVN > > Northbound 'Static_MAC_Binding' table > > for this feature to work ? Please correct me if I'm wrong. > > If this is the case, then it needs to be documented properly (perhaps > > in ovn-nb.xml) > > no the limitation is only that the CMS must not set > dynamic_neigh_routers to true on the Logical_Routers. > > If there are other reasons that cause OVN to send ARP request to lookup > the nexthop of a route then these will have that issue as well. I am > just no aware of any such reason.
Thanks. I'm still not clear what happens if OVN doesn't know the nexthop mac address. What happens in that case ? Normally, OVN would generate ARP request for the next hop IP and learn the mac. What happens in the mix route case ? Numan > > > > > The patch overall looks good to me. Can you please add a small test > > case in ovn-northd.at to check > > the expected logical flows in the "lr_in_ip_routing" stage when you > > have these mixed mode static routes ? > > You can also check for correctness of flows in other tables too which > > are generated for the static routes. > > Yes i'll do that and send a new version. > > Thanks > Felix > > > > > Thanks > > Numan > > > > > > > _______________________________________________ > dev mailing list > d...@openvswitch.org > https://mail.openvswitch.org/mailman/listinfo/ovs-dev _______________________________________________ dev mailing list d...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-dev
