libvirt users - Feb 2014 - Re: F20 Virt-Manager with MacVTap not working

Hello,
I've setup a VM with default networking (NAT) and this works fine but hosts
on my LAN can't get to the VM since it uses NAT.

When I try to set network to use MacVTap with either default or bridged I
get no networking for the VM.
Any hints around this? I would like to have the VM's on the same LAN as my
host and other machines. I don't care if the VM host can't reach the
guests.

It did work find in F19 but there I believe I had more MacVtap devices to
choose from.

-- john

On 02/12/2014 10:07 AM, John Obaterspok wrote:
> Hello,
> I've setup a VM with default networking (NAT) and this works fine but
> hosts on my LAN can't get to the VM since it uses NAT.
>
> When I try to set network to use MacVTap with either default or
> bridged I get no networking for the VM. 
> Any hints around this? I would like to have the VM's on the same LAN
> as my host and other machines. I don't care if the VM host can't
reach
> the guests.
>
> It did work find in F19 but there I believe I had more MacVtap devices
> to choose from.
I am using macvtap on F20 with no problems. Which device are you
selecting to connect the macvtap device to? You should use the physical
device that your host uses for network communication. Please send the
<interface> section of the output of "virsh $guestname dumpxml"
(where
$guestname is, of course, the name of the guest with non-working
networking).

The guest was setup through virt-manager. The machine is not configured
much after a F20 install (I believe I didn't change any network things)

 Here is the network part:

   <interface type='direct'>
      <mac address='52:54:00:fe:b0:66'/>
      <source dev='em1' mode='bridge'/>
      <target dev='macvtap0'/>
      <model type='virtio'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x00'
slot='0x03'
function='0x0'/>
    </interface>


and the complete dump:

<domain type='kvm' id='3'>
  <name>winpc</name>
  <uuid>3d333333-3333-3333-3333-333333333333</uuid>
  <memory unit='KiB'>2097152</memory>
  <currentMemory unit='KiB'>2097152</currentMemory>
  <vcpu placement='static'>1</vcpu>
  <resource>
    <partition>/machine</partition>
  </resource>
  <os>
    <type arch='x86_64'
machine='pc-i440fx-1.6'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <apic/>
    <pae/>
  </features>
  <clock offset='localtime'>
    <timer name='rtc' tickpolicy='catchup'/>
    <timer name='pit' tickpolicy='delay'/>
    <timer name='hpet' present='no'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <emulator>/usr/bin/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='vmdk'/>
      <source file='/vm/storage/win8pc.img'/>
      <target dev='vda' bus='virtio'/>
      <alias name='virtio-disk0'/>
      <address type='pci' domain='0x0000' bus='0x00'
slot='0x07'
function='0x0'/>
    </disk>
    <controller type='usb' index='0'
model='ich9-ehci1'>
      <alias name='usb0'/>
      <address type='pci' domain='0x0000' bus='0x00'
slot='0x05'
function='0x7'/>
    </controller>
    <controller type='usb' index='0'
model='ich9-uhci1'>
      <alias name='usb0'/>
      <master startport='0'/>
      <address type='pci' domain='0x0000' bus='0x00'
slot='0x05'
function='0x0' multifunction='on'/>
    </controller>
    <controller type='usb' index='0'
model='ich9-uhci2'>
      <alias name='usb0'/>
      <master startport='2'/>
      <address type='pci' domain='0x0000' bus='0x00'
slot='0x05'
function='0x1'/>
    </controller>
    <controller type='usb' index='0'
model='ich9-uhci3'>
      <alias name='usb0'/>
      <master startport='4'/>
      <address type='pci' domain='0x0000' bus='0x00'
slot='0x05'
function='0x2'/>
    </controller>
    <controller type='pci' index='0'
model='pci-root'>
      <alias name='pci.0'/>
    </controller>
    <controller type='virtio-serial' index='0'>
      <alias name='virtio-serial0'/>
      <address type='pci' domain='0x0000' bus='0x00'
slot='0x06'
function='0x0'/>
    </controller>
    <interface type='direct'>
      <mac address='52:54:00:fe:b0:66'/>
      <source dev='em1' mode='bridge'/>
      <target dev='macvtap0'/>
      <model type='virtio'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x00'
slot='0x03'
function='0x0'/>
    </interface>
 <serial type='pty'>
      <source path='/dev/pts/2'/>
      <target port='0'/>
      <alias name='serial0'/>
    </serial>
    <console type='pty' tty='/dev/pts/2'>
      <source path='/dev/pts/2'/>
      <target type='serial' port='0'/>
      <alias name='serial0'/>
    </console>
    <channel type='spicevmc'>
      <target type='virtio' name='com.redhat.spice.0'/>
      <alias name='channel0'/>
      <address type='virtio-serial' controller='0'
bus='0' port='1'/>
    </channel>
    <input type='tablet' bus='usb'>
      <alias name='input0'/>
    </input>
    <input type='mouse' bus='ps2'/>
    <graphics type='spice' port='5900' autoport='yes'
listen='127.0.0.1'>
      <listen type='address' address='127.0.0.1'/>
    </graphics>
    <sound model='ich6'>
      <alias name='sound0'/>
      <address type='pci' domain='0x0000' bus='0x00'
slot='0x04'
function='0x0'/>
    </sound>
    <video>
      <model type='qxl' ram='65536' vram='65536'
heads='1'/>
      <alias name='video0'/>
      <address type='pci' domain='0x0000' bus='0x00'
slot='0x02'
function='0x0'/>
    </video>
    <memballoon model='virtio'>
      <alias name='balloon0'/>
      <address type='pci' domain='0x0000' bus='0x00'
slot='0x08'
function='0x0'/>
    </memballoon>
  </devices>
  <seclabel type='dynamic' model='selinux'
relabel='yes'>
    <label>system_u:system_r:svirt_t:s0:c296,c829</label>
   
<imagelabel>system_u:object_r:svirt_image_t:s0:c296,c829</imagelabel>
  </seclabel>
</domain>




2014-02-12 11:41 GMT+01:00 Laine Stump <laine@laine.org>:
>  On 02/12/2014 10:07 AM, John Obaterspok wrote:
>
> Hello,
> I've setup a VM with default networking (NAT) and this works fine but
> hosts on my LAN can't get to the VM since it uses NAT.
>
> When I try to set network to use MacVTap with either default or bridged I
> get no networking for the VM.
> Any hints around this? I would like to have the VM's on the same LAN as
my
> host and other machines. I don't care if the VM host can't reach
the guests.
>
>  It did work find in F19 but there I believe I had more MacVtap devices
> to choose from.
>
>
> I am using macvtap on F20 with no problems. Which device are you selecting
> to connect the macvtap device to? You should use the physical device that
> your host uses for network communication. Please send the <interface>
> section of the output of "virsh $guestname dumpxml" (where
$guestname is,
> of course, the name of the guest with non-working networking).
>