[ovs-discuss] OVS-DPDK vhostuser guest ping issue

Rapelly, Varun vrapelly at sonusnet.com
Mon Jan 18 09:03:24 UTC 2016

Hi All,
 I'm facing a following issue with OVS-DPDK dpdkvhostuser port. I was able to create ovs bridge with dpdkvhostuser port types and able to ping the gateway from ovs bridges on the host. But when I'm creating guest VM using dpdkvhostuser port type, not able to ping gateway on guest VM. Not seeing any error logs in vswitchd log.
 Following are the list of commands that I used:
 [root at kujo ~]# ovs-vsctl --no-wait add-br pkt1 -- set Bridge pkt1 datapath_type=netdev
[root at kujo ~]# ovs-vsctl add-port pkt1 dpdk0 -- set Interface dpdk0 type=dpdk
[root at kujo ~]# ovs-vsctl add-port pkt1 vhostuser0 -- set Interface vhostuser0 type=dpdkvhostuser
[root at kujo ~]#  qemu-system-x86_64 -smp 4 -boot d -cdrom TinyCore-current.iso -m 512 TinyCore-current.iso -boot d -name varun  -object memory-backend-file,id=mem,size=8192M,mem-path=/dev/hugepages,share=on -mem-prealloc -chardev socket,id=char1,path=/usr/local/var/run/openvswitch/vhostuser0 -netdev type=vhost-user,id=mynet1,chardev=char1,vhostforce -device virtio-net-pci,mac=52:55:00:00:20:11,netdev=mynet1 -daemonize
qemu-system-x86_64: -netdev type=vhost-user,id=mynet1,chardev=char1,vhostforce: chardev "char1" went up
WARNING: Image format was not specified for 'TinyCore-current.iso' and probing guessed raw.
         Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted.
         Specify the 'raw' format explicitly to remove the restrictions.
VNC server running on `::1:5900'
[root at kujo ~]# ifconfig pkt1 netmask up
[root at kujo ~]# ping -I pkt1 [on host]
PING ( from pkt1: 56(84) bytes of data.
64 bytes from<>: icmp_seq=1 ttl=255 time=11.7 ms
64 bytes from<>: icmp_seq=2 ttl=255 time=0.930 ms
--- ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 0.930/6.351/11.773/5.422 ms
[root at kujo ~]# ovs-vsctl show
    Bridge "pkt1"
        Port "pkt1"
            Interface "pkt1"
                type: internal
        Port "dpdk0"
            Interface "dpdk0"
                type: dpdk
        Port "vhostuser0"
            Interface "vhostuser0"
                type: dpdkvhostuser

[root at kujo ~]# ovs-ofctl dump-flows pkt1
NXST_FLOW reply (xid=0x4):
cookie=0x0, duration=86.627s, table=0, n_packets=89, n_bytes=8446, idle_age=0, priority=0 actions=NORMAL

[root at kujo ~]# ovs-ofctl dump-ports pkt1
OFPST_PORT reply (xid=0x2): 3 ports
  port LOCAL: rx pkts=11, bytes=830, drop=0, errs=0, frame=0, over=0, crc=0
           tx pkts=5, bytes=434, drop=0, errs=0, coll=0
  port  1: rx pkts=86, bytes=8638, drop=0, errs=0, frame=0, over=0, crc=0
           tx pkts=11, bytes=928, drop=0, errs=0, coll=0
  port  2: rx pkts=0, bytes=?, drop=?, errs=?, frame=?, over=?, crc=?
           tx pkts=0, bytes=?, drop=11, errs=?, coll=?

When i'm pinging the guest VM IP [], I could see the packets coming on ovs bridge interface.
 [root at kujo ~]# ifconfig pkt1
pkt1: flags=323<UP,BROADCAST,RUNNING,PROMISC>  mtu 1500
        inet  netmask  broadcast
        inet6 fe80::e611:5bff:fe98:962  prefixlen 64  scopeid 0x20<link>
        ether e4:11:5b:98:09:62  txqueuelen 500  (Ethernet)
        RX packets 10  bytes 850 (850.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 11  bytes 830 (830.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root at kujo ~]# tcpdump -i pkt1
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on pkt1, link-type EN10MB (Ethernet), capture size 65535 bytes
11:01:36.852756 ARP, Request who-has tell, length 46
11:01:41.581666 ARP, Request who-has tell, length 46
2 packets captured
2 packets received by filter
0 packets dropped by kernel

[root at kujo ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface         UG    100    0        0 eno1   U     100    0        0 eno1   U     0      0        0 pkt1   U     0      0        0 virbr0

Please give me some points to debug this issue. Few months back I used the same steps on the same host, it worked fine. I didn't face this kind of issue.
Thanks in advance.



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://openvswitch.org/pipermail/ovs-discuss/attachments/20160118/061df7d8/attachment-0002.html>

More information about the discuss mailing list