On Thu, Mar 31, 2016 at 3:02 PM, Ramu Ramamurthy <ramu.ramamur...@gmail.com> wrote:
> > > > Why did you choose to use reply packets ? > > > > request packets are less likely to be rejected by external networks > > and I think thats discussed in the RFC > > > > > > I wanted to use the GARP request, but found a problem. > > OVN currently programs flows to respond to gratuitous arp requests from > VMs, > Such flows also respond to ARP probes from VMs. This behavior needs to > change so that OVN must not respond to GARP requests or ARP probes. > It must flood them. This change is a work in progress. > In fact, some DHCP clients send ARP probes after the DHCP ACK to > verify no address collisions, and upon seeing ARP probe response will > decline > dhcp offered IP. > > As soon as the above problem is fixed, I can update the code to > generate GARP requests. > Practically speaking, you will need to fix that for real world utility, although I am sure an autotest test can be written that "passes" now. On a separate but related topic, northd programs localnet to not respond to regular arp requests coming from the network via a localnet port. How can IP traffic be initiated from a VM outside OVN control or from the physical network to a VM inside OVN controlled HV, connected via a localnet port ? Are you depending on flooding the network with gARPs periodically (to handle new external hosts) for all VMs on all HVs inside OVN, attached to localnet ? /* Ingress table 3: ARP responder, skip requests coming from localnet ports. * (priority 100). */ HMAP_FOR_EACH (op, key_node, ports) { if (!op->nbs) { continue; } if (!strcmp(op->nbs->type, "localnet")) { char *match = xasprintf("inport == %s", op->json_key); ovn_lflow_add(lflows, op->od, S_SWITCH_IN_ARP_RSP, 100, match, "next;"); free(match); } } _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev