netdev_linux|INFO|ioctl(SIOCGIFHWADDR) on tapd7ebabc9-4f device failed: No such device

Jul 24 20:06:41|01035|bridge|INFO|destroyed port qr-725d56fb-f7 on bridge br-int
Jul 24 20:06:41|01036|bridge|WARN|bridge br-tun: using default bridge Ethernet address 6a:13:96:eb:35:4e
Jul 24 20:06:41|01037|netdev_linux|INFO|ioctl(SIOCGIFHWADDR) on tapd7ebabc9-4f device failed: No such device
Jul 24 20:06:41|01038|bridge|WARN|bridge br-int: using default bridge Ethernet address b2:e5:c8:7e:bd:4d
Jul 24 20:06:47|01039|netdev|WARN|Dropped 76 log messages in last 12 seconds (most recently, 1 seconds ago) due to excessive rate

openstack 出现上面的问题 会导致虚拟机获取不到IP
请先检查你系统的版本是否是centos /REDHAT 6.5
如果是的话 需要在网络节点修改配置文件
/etc/neutron/dhcp_agent.ini和l3_agent.ini文件 即可。
ovs_use_veth = True

注意重启服务的顺序：在网络节点先重启
service neutron-l3-agent restart
service neutron-dhcp-agent restart
service neutron-metadata-agent restart
/etc/init.d/openvswitch restart

如果还是不行
/etc/init.d/openvswitch force-reload-kmod 执行这个网卡将会出现

原文出处： http://www.linuxqq.net/archives/1190.html