On Tue, Apr 12, 2016 at 12:58:44PM +0300, Vasiliy Tolstov wrote: > 2016-04-12 4:29 GMT+03:00 Ben Pfaff <b...@ovn.org>: > >> In some usecases such as VM migration or when VMs reuse IP addresses, > >> VMs become unreachable externally because > >> external switches/routers on localnet > >> have stale port-mac or arp caches. The problem resolves > >> after some time when the caches ageout which could be > >> minutes for port-mac bindings or hours for arp caches. > >> > >> To fix this, send some gratuitous ARPs when a logical > >> port on a localnet datapath gets added. Such gratuitous arps > >> help on a best-effort basis to update the mac-port bindings and arp-caches > >> of external switches and routers on the localnet. > > Why send garp and not to create two flows that duplicates all traffic > to source and destination vm? > So in this case we don't need garp at all.
localnet is used for connecting to physical networks that OVN does not control, so there is no way to do this. _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
