On Mon, Jul 14, 2014 at 5:23 PM, Shridhar Sahukar <shridhar.sahu...@cyaninc.com> wrote: > Thanks for the response Gurucharan > > I dont have any issues with the routing table entries. As mentioned, after > setting up the tunnel, if I cannot ping from br0 -> br1, and at that time, > if I initiate a ping in the reverse direction, i.e. from br1->br0 (which > works), everything starts working. On tcpdump, I have observed the ARP > requests making it to the eth0 on the other host, but the same request is > not seen on the bridge, and neither do I see the response.
What happens when both of the hosts are in the same subnet? Does a ping work? > > Thanks, > Shridhar > > > On Mon, Jul 14, 2014 at 4:54 PM, Gurucharan Shetty <shet...@nicira.com> > wrote: >> >> On Mon, Jul 14, 2014 at 4:22 PM, Shridhar Sahukar >> <shridhar.sahu...@cyaninc.com> wrote: >> > Hi, >> > >> > On my setup, I have 2 hosts connected with a GRE tunnel with following >> > configuration: >> > >> > Host 1: >> > >> > #ovs-vsctl add-br br0 >> > #ifconfig br0 1.1.1.1 >> > #ovs-vsctl add-port br0 gre0 -- set interface gre0 type=gre >> > options:remote_ip=<eth0 ip of host2> >> > >> > Host 2: >> > #ovs-vsctl add-br br1 >> > #ifconfig br1 1.1.2.1 >> > #ovs-vsctl add-port br1 gre0 -- set interface gre0 type=gre >> > options:remote_ip=<eth0 ip of host1> >> >> > >> > As you can see, bridge 0 on host-1 and bridge 1 on host-2 are in >> > different >> > subnet and I am trying to connect them with a GRE tunnel. >> I suppose you have set the netmask properly. Otherwise they are in the >> same subnet. >> Assuming they are in different subnet, you will probably need routing >> table entries. >> >> >> > >> > This setup works as expected for all other purposes, except that during >> > the >> > initial setup the ARP communication does not happen as expected. >> > >> > Most of the times, when we ping bridge0 IP from host2 or bridge1 IP from >> > host1, the ping does not work. tcpdump on the eth0 interface shows >> > incoming >> > ARP requests, but I dont see any ARP responses going back. At this >> > point, if >> > I initiate a reverse ping then everything starts working. >> > >> > It seems that the ARP requests are not getting forwarded to the bridge >> > from >> > the GRE interface. Do I need to add any special flow? >> > >> > Any help is much appreciated. >> > >> > Thanks, >> > Shridhar >> > >> > >> > _______________________________________________ >> > discuss mailing list >> > discuss@openvswitch.org >> > http://openvswitch.org/mailman/listinfo/discuss >> > > > _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
