Re: [Xen-users] network problem: Cannot find network for bridge

["Marco Strullato" <marco.strullato@xxxxxxxxx>]

I've created virtual machines with virt-manager and now I have to export, change and re-import xml configurations: I don't have a regular xen configuration file but and xml. Here's the mine.

<domain type='xen' id='2'>
  <name>WinXP</name>
  <uuid>f3834331-f045-4b4b-90ad-0a57ec790248</uuid>
  <os>
    <type>hvm</type>
    <loader>/usr/lib/xen/boot/hvmloader</loader>
    <boot dev='hd'/>
  </os>
  <memory>1562624</memory>
  <vcpu>2</vcpu>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <features>
    <acpi/>
    <apic/>
    <pae/>
  </features>
  <clock offset='utc'/>
  <devices>
    <emulator>/usr/lib/xen/bin/qemu-dm</emulator>
    <interface type='bridge'>
      <source bridge='xenbr0'/>
      <target dev='vif2.0'/>
      <mac address='00:16:3e:3f:54:42'/>
      <script path='vif-bridge'/>
    </interface>
    <disk type='block' device='disk'>
      <driver name='phy'/>
      <source dev='/dev/VolGroup00/WinXP'/>
      <target dev='hda'/>
    </disk>
    <disk type='block' device='cdrom'>
      <driver name='phy'/>
      <source dev='/dev/cdrom'/>
      <target dev='hdc'/>
      <readonly/>
    </disk>
    <input type='mouse' bus='ps2'/>
    <graphics type='vnc' port='5900' keymap='it'/>
  </devices>
</domain>

I know that I should have the bridge xenbr0 but I don't know why... Where should I check?
It's stange beacuse the linux vm's network works well.

Suggestions?

Thanks
Marco

2007/10/8, Fajar A. Nugraha <fajar@xxxxxxxxxxxxx>:

Marco Strullato wrote:
> Hi all, I have a network problem:
> Dom0 has:
> Dom1: linux paravirtualized
> Dom2: winxp hvm
>
> It worked well but now winxp can not connect to network:
>
> Dom0 has eth0, lo, peth0, vif1.0 and vif3.0
>
That's weird. You should also have some tap interfaces for HVM domains.
Do you remember to put "type=ioemu" on winxp's vif config line?

> [root@localhost xen]# brctl show
> bridge name     bridge id               STP enabled     interfaces
> eth0            8000.00155880c616       no              vif3.0
>                                                         vif1.0
>                                                         peth0
>
>
It says your bridge is called eth0

> From xend.log
>
> Exception: Cannot find network for bridge xenbr0
But xend.log says you're using xenbr0 in your config file.

The befault network-bridge script should create a bridge called xenbr0.
If you use a custom bridge script, you should modify your domU config
accordingly. It should be (on your setup) something like

vif = [ 'type=ioemu, mac=SOME_FIXED_MAC_ADDRESS_HERE, bridge=eth0' ]

Regards,

Fajar



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