On Mon, Jul 13, 2020 at 10:50 PM Numan Siddique <num...@ovn.org> wrote:
> On Tue, Jul 14, 2020 at 8:13 AM Girish Moodalbail <gmoodalb...@gmail.com> > wrote: > > > > Hello Han, Dumitru, Numan, and others, > > > > > > As per OVN architecture documentation, `join` logical switch is > exclusively used to connect the gateway routers to distributed routers. So, > all the ports connected to the join switch are ‘router’ > logical_switch_ports. Now, > > > > > > Say a packet arrives on the gateway router and is meant for a VM behind > a logical switch. We lookup the routing table, determine the nexthop, find > the destination MAC address for the nexthop IP from lr_in_arp_resolve table > and send the packet out towards the distributed router. > > > > > > On the other direction, the packet from a VM towards 8.8.8.8 arrives at > the distributed router. We lookup the routing table, determine the nexhop, > find the destination MAC address for the nexthop IP lfrom lr_in_arp_resolve > table and send the packet out towards the gateway router. > > > > > > From (a) and (b) above, at least on the Join switch, we should never see > any ‘ARP requests at all, right? If this is the case, then the whole > ls_in_arp_rsp table for the join switch can be just > > Hi Girish, > > I don't think ovn-northd/ovn-controller can say if a logical switch is > a join switch or not. I think OVN can address this by providing an > option in the logical_switch options column and if it is set to true, > ovn-northd will not populate > the ls_in_arp_rps table at all. ovn-k8s should set this option when > creating join logical switches. > > Any thoughts on this approach ? > Thanks Numan for the reply. Absolutely agree. Options based approach would be the way to go. Regards, ~Girish > Thanks > Numan > > > > > > > > table=13(ls_in_arp_rsp ), priority=0 , match=(1), > action=(next;) > > > > > > Any thoughts? > > > > > > In a 1000 Node K8s cluster, there are around 12K Logical Flows for > `join` switch. Out of which, 6K Logical flows are from table=13 and none > of those flows are being used. I am trying to see if we can optimize this > path. > > > > > > > > Regards, > > > > ~Girish > > > > > > -- > > You received this message because you are subscribed to the Google > Groups "ovn-kubernetes" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to ovn-kubernetes+unsubscr...@googlegroups.com. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/ovn-kubernetes/CAAF2STSCRqYJW5nojZJOrRhSEg%2BmJeyTEEL3EmHY0pnWYs9Vbg%40mail.gmail.com > . >
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