Hi Ilya,
Thanks for you reply. We did further investigation and from the finding it
seems related to the QEMU/libvirt version. The ping starts to work on DPDK
bridge after we rollback the QEMU/libvirt version. Are you aware if there any
new config needed to use the newer QEMU version?
Alex
Non-working: The ping from host to VM caused the ovs_tx_failure_drops counter
to go up.
[root@nfvis ~]# virsh version
Compiled against library: libvirt 8.0.0
Using library: libvirt 8.0.0
Using API: QEMU 8.0.0
Running hypervisor: QEMU 6.2.0
[root@nfvis ~]# ovs-vswitchd --version
ovs-vswitchd (Open vSwitch) 2.17.0
DPDK 21.11.0
[root@nfvis ~]# ovs-vsctl get Interface vnic1 statistics
{ovs_rx_qos_drops=0, ovs_tx_failure_drops=15, ovs_tx_invalid_hwol_drops=0,
ovs_tx_mtu_exceeded_drops=0, ovs_tx_qos_drops=0, ovs_tx_retries=0,
rx_1024_to_1522_packets=0, rx_128_to_255_packets=0, rx_1523_to_max_packets=0,
rx_1_to_64_packets=0, rx_256_to_511_packets=0, rx_512_to_1023_packets=0,
rx_65_to_127_packets=0, rx_bytes=0, rx_dropped=0, rx_errors=0, rx_packets=0,
tx_bytes=0, tx_dropped=15, tx_packets=0}
[root@nfvis ~]#
Working:
[root@nfvis ~]# virsh version
Compiled against library: libvirt 6.0.0. <-- rollback to 6.0.0
Using library: libvirt 6.0.0
Using API: QEMU 6.0.0
Running hypervisor: QEMU 4.2.0
[root@nfvis ~]# ovs-vswitchd --version
ovs-vswitchd (Open vSwitch) 2.17.0
DPDK 21.11.0
[root@nfvis ~]# ovs-vsctl get Interface vnic1 statistics
{ovs_rx_qos_drops=0, ovs_tx_failure_drops=0, ovs_tx_invalid_hwol_drops=0,
ovs_tx_mtu_exceeded_drops=0, ovs_tx_qos_drops=0, ovs_tx_retries=0,
rx_1024_to_1522_packets=0, rx_128_to_255_packets=0, rx_1523_to_max_packets=0,
rx_1_to_64_packets=1, rx_256_to_511_packets=0, rx_512_to_1023_packets=0,
rx_65_to_127_packets=73, rx_bytes=6318, rx_dropped=0, rx_errors=0,
rx_packets=74, tx_bytes=6318, tx_dropped=0, tx_packets=74}
[root@nfvis ~]#
On 5/24/23, 12:37 PM, "Ilya Maximets" <[email protected]
<mailto:[email protected]>> wrote:
On 5/24/23 20:04, Alex Yeh (ayeh) via discuss wrote:
> Hi All,
>
> A little more info on the qemu version of the working and not working setup.
>
> Thanks
> Alex
>
> Working:
> [root@nfvis ~]# /usr/libexec/qemu-kvm --version
> QEMU emulator version 4.2.0 (qemu-kvm-4.2.0-48.el8)
> Copyright (c) 2003-2019 Fabrice Bellard and the QEMU Project developers
>
> [root@nfvis ~]#
> Non-working:
>
> [root@nfvis ~]# /usr/libexec/qemu-kvm --version
> QEMU emulator version 6.2.0 (qemu-kvm-6.2.0-11.el8)
> Copyright (c) 2003-2021 Fabrice Bellard and the QEMU Project developers
>
> Thanks
> Alex
>
> *From: *"Alex Yeh (ayeh)" <[email protected] <mailto:[email protected]>>
> *Date: *Tuesday, May 23, 2023 at 2:58 PM
> *To: *"[email protected] <mailto:[email protected]>"
> <[email protected] <mailto:[email protected]>>
> *Subject: *Ping over dpdk bridge failed after upgrade to OVS 2.17.3
>
> Hi All,
>
> We were running OVS 2.13.0/DPDK 19.11.1 and the VMs were able to ping over
> the DPDK bridge. After upgrade to OVS 2.17.3 the VMs can’t ping over the DPDK
> bridge with the same OVS config. Does anyone have seen the same issue and
> have a way to fix the issue?
Nothing in particular comes to mind. You need to check the logs for warnings
or errors. And check datapath flows installed to see if there is something
abnormal there. Check QEMU logs for vhost user related messages.
If everything looks correct, but there is no traffic, check if you have
shared memory backend in qemu (a common issue when everything seems normal).
Best regards, Ilya Maximets.
>
> Thanks
> Alex
>
> OVS bridge setup, VMs are connected to vnic1 and vnic3:
>
> Bridge dpdk-br
> datapath_type: netdev
> Port dpdk-br
> Interface dpdk-br
> type: internal
>
> Port vnic1
> Interface vnic1
> type: dpdkvhostuserclient
> options: {vhost-server-path="/run/vhostfd/vnic1"}
>
> Port vnic3
> Interface vnic3
> type: dpdkvhostuserclient
> options: {vhost-server-path="/run/vhostfd/vnic3"}
>
> ovs_version: "2.17.7"
>
> Working:
> [root@nfvis-csp-45 ~]# ovs-vswitchd --version
> ovs-vswitchd (Open vSwitch) 2.13.0
> DPDK 19.11.1
>
> Not working:
> [root@nfvis nfvos-confd]# ovs-vswitchd --version
> ovs-vswitchd (Open vSwitch) 2.17.3
> DPDK 21.11.0
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