i add the options 'csum=off,gso=off,guest_tso4=off,guest_tso6=off,guest_ecn=off'
on my guesttx-checksumming: off that is ok
but
rx-chechsumming:on [fixed] it can not to be changed!
Is there some way to be change the 'fixed'?
*********************RTFSC*********************------------------------------------------------------------------发件人：Daniele
Di Proietto <diproiet...@vmware.com>发送时间：2015年5月20日(星期三) 23:12收件人：Traynor,
Kevin <kevin.tray...@intel.com>抄 送：通天晓0280 <do...@dtdream.com>，discuss
<discuss@openvswitch.org>，钢锁0310 <l...@dtdream.com>主 题：Re: [ovs-discuss] For
help about ssh between vms through ovs-dkdpOn 20/05/2015 15:21, "Traynor,
Kevin" <kevin.tray...@intel.com> wrote:>>>> -----Original Message----->>> From:
Daniele Di Proietto [mailto:diproiet...@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=off>>>>I checked this previously and the DPDK vhost lib will report
those>features>>as not available during negotiation so you should be ok with
not>specifying>>them 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>feedback>>from Michael Tsirkin and testing. So unless we find an
issue, I'd prefer>to>>leave optional.
>>https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_openvswitc>h_ovs_blob_master_INSTALL.DPDK.md-23dpdk-2Dvhost-2Dvm-2Dconfiguration&d=Aw>IGoQ&c=Sqcl0Ez6M0X8aeM67LKIiDJAXVeAw-YihVMNtXt-uEs&r=SmB5nZacmXNq0gKCC1s_C>w5yUNjxgD4v5kJqZ2uWLlE&m=iM-aCjDqF2zfP98Zeafj9Z78WnCYvkzPSyZeV1kVGWg&s=SOm>_egKoAfzUwWioueTrQ9W2sa_WSUwKC74LO5SNvWs&e=>If
I don't add the extra options, my guests (Debian wheezy kernel 3.2 andUbuntu
14.04 kernel 3.13, running on QEMU 2.1.3) see these features# ethtool -k
eth0Features for eth0:
rx-checksumming: off[fixed]
tx-checksumming: on tx-checksum-ipv4: off [fixed]
tx-checksum-unneeded: off [fixed] tx-checksum-ip-generic: on
tx-checksum-ipv6: off [fixed] tx-checksum-fcoe-crc: off [fixed]
tx-checksum-sctp: off [fixed]
scatter-gather: on tx-scatter-gather: on
tx-scatter-gather-fraglist: on
tcp-segmentation-offload:on tx-tcp-segmentation: on
tx-tcp-ecn-segmentation: on tx-tcp6-segmentation: on
udp-fragmentation-offload:on
generic-segmentation-offload: on
generic-receive-offload: on
large-receive-offload: off[fixed][...]Pings work, but everything else (e.g. DNS
lookups) doesn't.To fix the setup I have either to add the extra options or to
disable theoffloads (inside the guest) with ethtool -K eth0 tx off
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