On 12/13/2011 12:59 PM, Amit Tewari wrote:

Hi all,

 

My test environment

Host os=rhel6.1

Guest os = rhel6.1

Libvirt=0.9.8

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

 

It gives following message

“Bringing up interface eth0:  Device eth0 does not seem to be present, delaying initialization.

[FAILED]”

The interface name may change to ethN(N may be 1 or 2 ...) due to the change of guest interface mac address.
You can log in guest and use command: "ip  link show" to get the value of N.
Then create ifcfg-ethN for it and use "ifup ethN" to start it in guest.

 

Guest eth interface does not create. What is the problem?

 

When I checked dmesg on host it gives following message—“macvatp0: ipv6 routers not present”

 

Please let me know how macvtap work on kvm.

 

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