# OpenNebula - KVM - OpenVSwitch Cannot Ping in or out **URL:** \ **Category:** Product Support\ **Created:** [April 4, 2015, 5:20pm UTC](https://forum.opennebula.io/t/opennebula-kvm-openvswitch-cannot-ping-in-or-out/548 "2015-04-04T17:20:55Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![rsvancara](https://avatars.discourse-cdn.com/v4/letter/r/9d8465/32.png) [@rsvancara](https://forum.opennebula.io/u/rsvancara)\ **Post date:** [April 4, 2015, 5:20pm UTC](https://forum.opennebula.io/t/opennebula-kvm-openvswitch-cannot-ping-in-or-out/548/1 "2015-04-04T17:20:55Z")
Hi, I have attempted to follow the documentation here for configuring Open Nebula, KVM and OpenVSwitch: [http://docs.opennebula.org/4.4/administration/networking/openvswitch.html](http://docs.opennebula.org/4.4/administration/networking/openvswitch.html) Unfortunately, my virtual machine is unable to ping out, and I am unable to ping the virtual machine. I have attempted creating the virtual machine several times with several different configurations, disabling IPTables. My node/host is running on Ubuntu 14.04 LTS. ``` # The loopback network interface auto lo iface lo inet loopback # The primary network interface auto eth0 iface eth0 inet manual up ifconfig $IFACE 0.0.0.0 up down ifconfig $IFACE down auto br0 iface br0 inet static address 192.168.3.4 netmask 255.255.255.0 gateway 192.168.3.1 broadcast 192.168.3.255 dns-nameservers 192.168.3.1 dns-search ailab.wsu.edu bridge_ports eth0 bridge_stp off bridge_fd 0 bridge_maxwait 0 ``` I add the oneadmin to the /etc/sudoers: ``` visudo oneadmin ALL = NOPASSWD: ALL ``` My list of bridges: brctl show ``` root@vm-node-02:~# brctl show bridge name bridge id STP enabled interfaces br0 8000.003048bbb1a5 no eth0 ``` ovs-vsctl show ``` root@vm-node-02:~# ovs-vsctl show 4b3b8d84-9606-4ee4-b63d-f330fcd0562f Bridge "br0" Port "br0" Interface "br0" type: internal Port "eth0" Interface "eth0" Port "vnet0" Interface "vnet0" ovs_version: "2.0.2" ``` ovs-ofctl show br0 ``` ovs-ofctl show br0 OFPT_FEATURES_REPLY (xid=0x2): dpid:0000da532db53e4c n_tables:254, n_buffers:256 capabilities: FLOW_STATS TABLE_STATS PORT_STATS QUEUE_STATS ARP_MATCH_IP actions: OUTPUT SET_VLAN_VID SET_VLAN_PCP STRIP_VLAN SET_DL_SRC SET_DL_DST SET_NW_SRC SET_NW_DST SET_NW_TOS SET_TP_SRC SET_TP_DST ENQUEUE 1(vnet0): addr:fe:00:c0:a8:03:50 config: 0 state: 0 current: 10MB-FD COPPER speed: 10 Mbps now, 0 Mbps max OFPT_GET_CONFIG_REPLY (xid=0x4): frags=normal miss_send_len=0 ``` ovs-ofctl dump-ports br0 ``` root@vm-node-02:~# ovs-ofctl dump-ports br0 OFPST_PORT reply (xid=0x2): 1 ports port 1: rx pkts=33, bytes=1602, drop=0, errs=0, frame=0, over=0, crc=0 tx pkts=0, bytes=0, drop=0, errs=0, coll=0 ``` What am I missing here? The symptoms seem like there is no network connectivity. In the VM I see ```
``` And I have an active virsh network??? ``` root@vm-node-02:~# virsh net-list --all Name State Autostart Persistent ---------------------------------------------------------- default active no yes ``` I have attempted to destroy this with: ``` 162 virsh net-destroy default 164 virsh net-autostart --disable default ``` So my question is what am I missing. This seems like it is pretty straight forward? Any advice appreciated! ---- Additional Information — Followed the tutorial here: > **[Install a KVM host on Ubuntu 14.04 Trusty Tahr - Thomas Elsen Security Blog](https://www.rivy.org/2014/04/install-a-kvm-host-on-ubuntu-14-04-trusty-tahr/)** > > How to install a KVM host and configure KVM with libvirt and Open vSwitch on Ubuntu 14.04 Trusty Tahr. My qemu command is: /usr/bin/qemu-system-x86\_64 -name one-108 -S -machine pc-i440fx-trusty,accel=kvm,usb=off -m 4096 -realtime mlock=off -smp 4,sockets=4,cores=1,threads=1 -uuid fda40786-52d0-4e36-beff-2b13fbd7eae6 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/one-108.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -boot strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive file=/var/lib/one//datastores/100/108/disk.0,if=none,id=drive-ide0-0-0,format=qcow2,cache=none -device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 -drive file=/var/lib/one//datastores/100/108/disk.1,if=none,id=drive-ide0-0-1,readonly=on,format=raw -device ide-cd,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1 -netdev tap,fd=24,id=hostnet0,vhost=on,vhostfd=25 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=02:00:c0:a8:03:50,bus=pci.0,addr=0x3 -vnc 0.0.0.0:108 -device cirrus-vga,id=video0,bus=pci.0,addr=0x2 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4 You can see that i am using virtio…The funny thing is that i have this working on another system no problem. I am not sure what is different from this system… ---
**Author:** ![rsvancara](https://avatars.discourse-cdn.com/v4/letter/r/9d8465/32.png) [@rsvancara](https://forum.opennebula.io/u/rsvancara)\ **Post date:** [April 6, 2015, 4:02pm UTC](https://forum.opennebula.io/t/opennebula-kvm-openvswitch-cannot-ping-in-or-out/548/2 "2015-04-06T16:02:19Z")
Another forum question lost in the abyss… I am following this tutorial now…can anyone at least comment whether this will work or not? > **[Install a KVM host on Ubuntu 14.04 Trusty Tahr - Thomas Elsen Security Blog](https://www.rivy.org/2014/04/install-a-kvm-host-on-ubuntu-14-04-trusty-tahr/)** > > How to install a KVM host and configure KVM with libvirt and Open vSwitch on Ubuntu 14.04 Trusty Tahr. ---
**Author:** ![jmelis](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.opennebula.io/jmelis/32/24_2.png) [@jmelis](https://forum.opennebula.io/u/jmelis)\ **Post date:** [April 6, 2015, 4:10pm UTC](https://forum.opennebula.io/t/opennebula-kvm-openvswitch-cannot-ping-in-or-out/548/3 "2015-04-06T16:10:36Z")
Hi Randall, I’m not sure if there’s some kind of conflict with you creating a bridge with the same name both in the Linux kernel and in Open vSwitch. You should either use Open vSwitch or Linux kernel but not both, as far as I understand… Could you try again without the Linux kernel br0 (that is, don’t define br0 in /etc/network/interfaces and assign the IP to eth0 directly) And then, after a prophylactic reboot, create the bridge with Open vSwitch and try again? Don’t mind the libvirt network, you can ignore it or remove it, it doesn’t really affect our setup. ---
**Author:** ![rsvancara](https://avatars.discourse-cdn.com/v4/letter/r/9d8465/32.png) [@rsvancara](https://forum.opennebula.io/u/rsvancara)\ **Post date:** [April 6, 2015, 4:42pm UTC](https://forum.opennebula.io/t/opennebula-kvm-openvswitch-cannot-ping-in-or-out/548/4 "2015-04-06T16:42:06Z")
Thanks, I will give this a try. ---
**Author:** ![rsvancara](https://avatars.discourse-cdn.com/v4/letter/r/9d8465/32.png) [@rsvancara](https://forum.opennebula.io/u/rsvancara)\ **Post date:** [April 7, 2015, 9:14pm UTC](https://forum.opennebula.io/t/opennebula-kvm-openvswitch-cannot-ping-in-or-out/548/5 "2015-04-07T21:14:01Z")
Credit goes to Jaimie Melis! /etc/network/interfaces # The primary network interface auto eth0 iface eth0 inet manual up ifconfig $IFACE 0.0.0.0 up down ifconfig $IFACE down auto br0 iface br0 inet static address 192.168.3.200 netmask 255.255.255.0 The important distinction is that i created the bridge using osv-svctl first using the add-br and then associating the bridge with eth0. Then I define the address of the bridge in /etc/network/interfaces. Lesson learned, osv bridges are not kernel bridges.