[ovs-discuss] 答复： For help about ssh between vms through ovs-dkdp

Thu May 21 05:07:13 UTC 2015

ovs log:2015-05-21T04:46:37.941Z|00023|connmgr|INFO|br0<->unix: 1 flow_mods in the last 0 s (1 adds)
2015-05-21T04:46:38.604Z|00024|connmgr|INFO|br0<->unix: 1 flow_mods in the last 0 s (1 adds)
2015-05-21T04:48:42.692Z|00001|dpdk(cuse_thread3)|INFO|vHost Device 'tap0' (0) has been added
2015-05-21T04:48:51.750Z|00002|dpdk(cuse_thread3)|INFO|vHost Device 'tap1' (1) has been added

qemu create tap with default name 'tap[id]'         adding port to ovs is ok    ping is work
and i add options 'csum=off,gso=off,guest_csum=off,guest_tso4=off,guest_tso6=off,guest_ecn=off'
in guset   
ethtool -k eth0


all things is off but     
ssh is still not work    
qemu 2.3.0dpdk 2.0.0ovs   compiled by git master
the OS of host and guest both are  'Linux 25.dpdk 3.10.0-229.el7.x86_64 #1 SMP Fri Mar 6 11:36:42 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux'
*********************RTFSC*********************------------------------------------------------------------------发件人：Traynor, Kevin <kevin.traynor at intel.com>发送时间：2015年5月20日(星期三) 22:21收件人：Daniele Di Proietto <diproiettod at vmware.com>，钢锁0310 <liw at dtdream.com>抄　送：通天晓0280 <dongj at dtdream.com>，discuss <discuss at openvswitch.org>主　题：RE: [ovs-discuss] For help about ssh between vms through ovs-dkdp> -----Original Message-----> From: Daniele Di Proietto [mailto:diproiettod at vmware.com]> Sent: Wednesday, May 20, 2015 1:47 PM> To: 钢锁0310> Cc: 通天晓0280; discuss; Traynor, Kevin> Subject: Re: [ovs-discuss] For help about ssh between vms through ovs-dkdp> > This might be related to offloading features.> > Could you try again with this qemu "-device" option and let us know?> -device> virtio-net-pci,netdev=net1,csum=off,gso=off,guest_tso4=off,guest_tso6=off,g> uest_ecn=offI checked this previously and the DPDK vhost lib will report those featuresas not available during negotiation so you should be ok with not specifyingthem explicitly in the qemu cmd line. I haven't tested with qemu 2.3.> > > Kevin, do you this we should mention this in INSTALL.DPDk.md?I had changed the original patch to make it optional in 3a based on feedbackfrom Michael Tsirkin and testing. So unless we find an issue, I'd prefer toleave optional. https://github.com/openvswitch/ovs/blob/master/INSTALL.DPDK.md#dpdk-vhost-vm-configuration> > > On 20/05/2015 10:39, "钢锁0310" <liw at dtdream.com> wrote:> > >i build the vm-ovsdpdk-vm environment by using vhost-cuse> >> >> >the cmd is following> >> >> >ovs-vsctl add-br br0 -- set bridge br0 datapath_type=netdev> >ovs-vsctl add-port br0 tap0 -- set Interface tap0 type=dpdkvhost> >ovs-vsctl add-port br0 tap1 -- set Interface tap1 type=dpdkvhost> >> >qemu-system-x86_64 cirros.img -m 2G -vnc :1 -object> >memory-backend-file,id=mem,size=2G,mem-path=/dev/hugepages,share=on -numa> >node,memdev=mem -mem-prealloc -netdev type=tap,id=net1,script=no,vhost=on> >-device virtio-net-pci,netdev=net1> >qemu-system-x86_64 cirros.img -m 2G -vnc :2 -object> >memory-backend-file,id=mem,size=2G,mem-path=/dev/hugepages,share=on -numa> >node,memdev=mem -mem-prealloc -netdev type=tap,id=net1,script=no,vhost=on> >-device virtio-net-pci,netdev=net1You are not specifying the ifname on the command line. What does thevswitchd.log say regarding the adding/removing of vhost ports?e.g. |INFO|vHost Device 'dpdkvhost1' (1) has been added> >> ># add ovs flow> >ovs-ofctl add-flow br0 in_port=1,action:output=2> >ovs-ofctl add-flow br0 in_port=2,action:output=1> >> >> >mac of vm1 is 00:00:00:00:00:01   vm2 is 00:00:00:00:00:02> >> >> >ping form vm1 to vm2 is ok, but ssh is not ok> >> >> >On vm1 run ssh to vm2,   Run tcpdump on vm2,  the catching packet as> >follow> >> >> >> >it seems the packets is all wrong> >> >> >Anyone meet this situation?What kernel version are you using in the guest? There is a known DPDK issuewith 3.19.5 in the guest when using the kernel to fwd pkts. The fix for itis here: http://dpdk.org/ml/archives/dev/2015-May/017251.html> >> >> >*********************> >RTFSC> >*********************> >> >> >
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