Re: [libvirt] macvtap nt working on kvm

On 12/14/2011 07:40 AM, Amit Tewari wrote: > > Hi all, > > My test environment > > Host os=rhel6.1 > > Guest os = rhel6.1 > > Libvirt=0.8.7 > > Kvm hypervisor > > I have made this entry in guest xml file > > <interface type='direct'> > > <source dev='eth0' mode='bridge'/> > > <model type='virtio'/> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x03' > function='0x0'/> > > </interface> > > Now when I start the guest > > *#virsh start guest* > > Following macvtap0 is created on host and is shown below > > #*ip link show macvtap0* > > 51: macvtap0@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc > mq state UNKNOWN qlen 500 > > link/ether 52:54:00:55:AE:B5brd ff:ff:ff:ff:ff:ff > > but when the guest is up and I try to perform > > ** > > *# ifup eth0* > > *eth0 has same mac address as that of macvatap0 that is > 52:54:00:55:AE:B5* > > ** > > *due to this guest is not able to get dhcp address nor static ip > address is working*. > > Please let me know how macvtap work on kvm. > I have tried your setup on my machine with the following host configuration: # brctl show bridge name bridge id STP enabled interfaces br0 8000.001a64d00016 no eth0 virbr0 8000.000000000000 yes If I use the configuration as you have shown it doesn't work for me, either. However, if I use <source dev='br0' mode='bridge'/> then it works as expected. Do you happen to have a similar configuration on the host with the interface the macvtap device wants to use as 'source' being bridged?