As a blind guess does this change anything (Using tunctl over your openvpn command)?
ovs-vsctl del-port br0 tap0 tunctl -d tap0 tunctl ovs-vsctl add-port br0 tap0 Restart vm using the new tap0 On Wed, Mar 21, 2012 at 1:20 AM, Ben Pfaff <b...@nicira.com> wrote: > The evidence points to a configuration error, since plenty of other > users do not see duplicate packets in similar situations. Again I > suggest that you read REPORTING-BUGS and provide the information > suggested there. > > On Wed, Mar 21, 2012 at 01:04:20PM +0800, Jingfei Hu wrote: > > Hi, Ben, > > In the last few days, I have spent my spare time on figuring out the > reason > > of ping DUP problem. Here is my result: > > The network setting including netmask\default gateway etc. contains no > > error. Following is the ip address setting and routing table of the host > > and the guest: > > -------------------------------------------------------------- > > Host: > > IP address: > > br0: 192.168.1.27 netmask 255.255.255.0 > > Routing table: > > Destination Gateway Genmask Flags Metric Ref Use > > Iface > > 0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 > br0 > > 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 > br0 > > > > Guest: > > IP address: > > eth0: 192.168.1.26 netmask 255.255.255.0 > > Routing table: > > Destination Gateway Genmask Flags Metric Ref Use > > Iface > > 0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 > eth0 > > 169.254.0.0(link-local) 0.0.0.0 255.255.0.0 U 1000 > 0 > > 0 eth0 > > 192.168.1.0 0.0.0.0 255.255.255.0 U 1 0 0 > eth0 > > -------------------------------------------------------------- > > The ping DUP problem is still there. > > Then in another machine, the same steps are executed with same host os > and > > same guest os, except that br0 is created using bridge-utils package, not > > ovs-vsctl. When ping from the guest, the DUP problem has gone. So it > seems > > that the bridge created by ovs-vsctl is different than the bridge created > > by bridge-utils package. Is that correct to say this problem is related > to > > ovs? > > > > Cheers, > > > > Hu Jingfei > > > > 3/19 Ben Pfaff <b...@nicira.com> > > > > > I don't see how br0 and eth0 having the same MAC address would cause > the > > > behavior that you mention. I would suggest following a conventional > > > troubleshooting procedure instead of making this assumption. > > > > > > If you want us to help with that troubleshooting then you can start > from > > > the suggestions in REPORTING-BUGS. > > > > > > On Mon, Mar 19, 2012 at 10:12:17AM +0800, Jingfei Hu wrote: > > > > Thanks, Ben, > > > > But there is a problem here. The following commands have not changed: > > > > ------------------------------------ > > > > sudo ovs-vsctl add-br br0 > > > > sudo ovs-vsctl set bridge br0 datapath_type=netdev > > > > sudo ovs-vsctl add-port br0 eth0 > > > > sudo ovs-vsctl add-port br0 tap0 > > > > ------------------------------------ > > > > The tap0 interface is created using OpenVPN utility with following > > > command: > > > > ------------------------------------ > > > > sudo openvpn --mktun --dev tap0 > > > > ------------------------------------ > > > > Then I have created a VM using VirtualBox-4.1 and made the VM use the > > > > Bridged Adapter tap0. IP address settings are: > > > > ------------------------------------ > > > > In my host: > > > > sudo ifconfig br0 192.168.1.24 netmask 255.255.255.0 > > > > eth0 and tap0 got no ip address assigned > > > > In the guest, i.e. VM: > > > > sudo ifconfig eth0 192.168.1.26 netmask 255.255.255.0 > > > > ------------------------------------ > > > > After that, my guest is able to reach the outside network, and the > > > machine > > > > which resides in the same LAN, says it's ip address is 192.168.1.14, > > > could > > > > also found my guest. The PROBLEM is: > > > > when I ping the 192.168.1.14 from my guest, the ICMP reply is always > > > > duplicated. I guess the cause is because the br0 has the same mac > address > > > > with eth0, but don't know how to solve it. > > > > Any ideas will be appreciated. Sorry for the question in question, I > > > should > > > > ask it in one post. > > > > > > > > Cheers, > > > > Hu Jingfei > > > > > > > > > > > > 2012/3/18 Ben Pfaff <b...@nicira.com> > > > > > > > > > On Sun, Mar 18, 2012 at 10:46:36PM +0800, Jingfei Hu wrote: > > > > > > I have installed OVS userspace program on Ubuntu Oneiric > according to > > > > > > INSTALL.Linux. Then I have added a bridge using following > commands: > > > > > > > > > > > > sudo ovs-vsctl add-br br0 > > > > > > sudo ovs-vsctl set bridge br0 datapath_type=netdev > > > > > > sudo ovs-vsctl add-port br0 eth0 > > > > > > sudo ovs-vsctl add-port br0 tap0 > > > > > > > > > > > > Then I setup the bridge br0 as follows: > > > > > > sudo ifconfig br0 192.168.1.24 netmask 255.255.255.0 > > > > > > After that, I check it with command ifconfig -a, finding that the > > > mac br0 > > > > > > and eth0 have the same mac. > > > > > > > > > > > > Is it normal? > > > > > > > > > > Yes. > > > > > > > > > _______________________________________________ > discuss mailing list > discuss@openvswitch.org > http://openvswitch.org/mailman/listinfo/discuss > -- Aaron O. Rosen Masters Student - Network Communication 306B Fluor Daniel
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