On 12/14/2011 02:26 PM, Stefan Berger wrote:
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?
Interesting. So you're saying that once the physical device is attached
to a bridge, a macvtap attached to that device no longer works? That's
useful to know :-)
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