Update
I see in log file the following error msgs ..
libvirtd[1734]: Failed to open file '/sys/class/net/tap0/operstate': No such
file or directory
libvirtd[1734]: unable to read: /sys/class/net/tap0/operstate: No such file or
directory
kernel: [ 38.948590] IPv6: ADDRCONF(NETDEV_UP): tap0: link is not ready
> -Original Message-
> From: Avi Cohen (A)
> Sent: Tuesday, 20 June, 2017 12:41 PM
> To: 'ovs-discuss@openvswitch.org'; 'us...@dpdk.org'
> Subject: OVS-DPDK - TAP0 - vdev (af_packet) device is linkdown
>
> Hello All,
>
> I did upgrade to dpdk-17.05 and ovs-2-7.1 and create a vdev - af_packet
> device according the config script below This tap device connects the ovs-
> dpdk to a name space The problem is that this tap00 device is linkdown -
> (never reach RUNNING state ) - hence no pkt is received transmitted on this
> interface although the tap0 creation in ovs is OK, I'm attaching the config
> script and output of netstat and ifconfig in the namespace Can someone
> please tell me how to activate the tap0 ?
>
> Config script :
>
>
> cd ../dpdk-17.05/usertools/
> modprobe uio
> insmod ../x86_64-native-linuxapp-gcc/kmod/igb_uio.ko
> ifconfig ens3 down
>
> ./dpdk-devbind.py --bind=igb_uio :00:03.0 ./dpdk-devbind.py --status
>
> cd -
>
> pkill -9 ovs
> rm -rf /usr/local/var/run/openvswitch
> rm -rf /usr/local/etc/openvswitch/
> rm -f /usr/local/etc/openvswitch/conf.db
> mkdir -p /usr/local/etc/openvswitch
> mkdir -p /usr/local/var/run/openvswitch
>
>
> ./ovsdb/ovsdb-tool create /usr/local/etc/openvswitch/conf.db
> ./vswitchd/vswitch.ovsschema ./ovsdb/ovsdb-server --
> remote=punix:/usr/local/var/run/openvswitch/db.sock --
> remote=db:Open_vSwitch,Open_vSwitch,manager_options --pidfile --detach
> ./utilities/ovs-vsctl --no-wait init
>
> echo 8192 > /sys/devices/system/node/node0/hugepages/hugepages-
> 2048kB/nr_hugepages
> echo 8192 > /sys/devices/system/node/node1/hugepages/hugepages-
> 2048kB/nr_hugepages
>
> mkdir -p /mnt/huge
> mkdir -p /mnt/huge_2mb
> mount -t hugetlbfs none /mnt/huge_2mb -o pagesize=2MB
>
> modprobe openvswitch
> export DB_SOCK=/usr/local/var/run/openvswitch/db.sock
>
> ./utilities/ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-init=true
> ./vswitchd/ovs-vswitchd unix:$DB_SOCK --pidfile --detach ./utilities/ovs-vsctl
> set Open_vSwitch . other_config:pmd-cpu-mask=0x80
>
>
>
> utilities/ovs-vsctl --may-exist add-br br-int \
> -- set Bridge br-int datapath_type=netdev \
> -- br-set-external-id br-int bridge-id br-int \
> -- set bridge br-int fail-mode=standalone
>
>
>
> ip tuntap add dev tap0 mode tap
>
> ovs-vsctl add-port br-int tap0 -- set Interface tap0 type=dpdk \
> options:dpdk-devargs=eth_af_packet0,iface=tap0
>
>
>
> ip netns add red
> ip link set tap0 netns red
> ip netns exec red ip addr add 1.1.1.20/24 dev tap0 ip netns exec red ip link
> set
> tap0 up
>
>
>
>
> utilities/ovs-vsctl --may-exist add-port br-int vxlan0 \
> -- set interface vxlan0 type=vxlan options:remote_ip=172.31.100.44
> options:key=1000
>
>
>
>
> utilities/ovs-vsctl --may-exist add-br br-phy \
> -- set Bridge br-phy datapath_type=netdev \
> -- br-set-external-id br-phy bridge-id br-phy \
> -- set bridge br-phy fail-mode=standalone \
>other_config:hwaddr=02:d7:d1:26:84:e5
>
>
> utilities/ovs-vsctl --timeout 10 --may-exist add-port br-phy dpdk0 -- set
> Interface dpdk0 type=dpdk options:dpdk-devargs=:00:03.0
>
>
>
>
> ip addr add 172.31.100.80/24 dev br-phy
>
>
>
> ip link set br-phy up
> ip link set br-int up
> iptables -F
>
>
> utilities/ovs-appctl ovs/route/show
>
>
> ip netns exec red bash
> ifconfig lo up
>
> #
> netstat -v -s -e
> Ip:
> 7 total packets received
> 0 forwarded
> 0 incoming packets discarded
> 7 incoming packets delivered
> 14 requests sent out
> Icmp:
> 7 ICMP messages received
> 0 input ICMP message failed.
> ICMP input histogram:
> destination unreachable: 7
> 14 ICMP messages sent
> 0 ICMP messages failed
> ICMP output histogram:
> destination unreachable: 7
> echo request: 7
> IcmpMsg:
> InType3: 7
> OutType3: 7
> OutType8: 7
> Tcp:
> 0 active connections openings
> 0 passive connection openings
> 0 failed connection attempts
> 0 connection resets received
> 0 connections established
> 0 segments received
> 0 segments send out
> 0 segments retransmited
> 0 bad segments received.
> 0 resets sent
> Udp:
> 0 packets received
> 0 packets to unknown port received.
> 0 packet receive errors
> 0 packets sent
> UdpLite:
> TcpExt:
> 0 packet headers predicted
> IpExt:
> InOctets: 784
> OutOctets: 1372
> InNoECTPkts: 7
> root@ip-172-31-100-80:/home/ubuntu/openvswitch-2.7.0# ifconfig
> loLink encap:Local Loopback
> inet addr:127.0.0.1 Mask:255.0.0.0
> inet6
