Re: [libvirt-users] vm pxe fail

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Hello,

On Aug 17, 2012, at 4:34 AM, Alex Jia wrote:

> Hi Andrew,
> I can't confirm a root reason based on your information, perhaps you may
> try to find a reason by yourself via the following docs:
> 
> http://wiki.libvirt.org/page/PXE_boot_%28or_dhcp%29_on_guest_failed  (Troubleshooting)
> http://docs.fedoraproject.org/en-US/Fedora/13/html/Virtualization_Guide/sect-Virtualization-Virtualized_guest_installation_overview-Installing_guests_with_PXE.html  (User Guide)

Everything seems quite normal.

> 
> If can't, please provide your version of kvm, libvirt, tftp, etc, and run 'virsh net-dumpxml br0' to dump your
> network bridge XML configuration, and run 'cat pxelinux.cfg' to show your pxelinux configuration, thanks.

default is my pxelinux configuration but I'm not sure is this is what your after.

dhcp is a protocol decode of the DHCP traffic. You see that the VM is sending each request twice which is a bit odd.

[root@node002 ~]# yum list | grep qemu
gpxe-roms-qemu.noarch                   0.9.7-6.9.el6               @base       
qemu-img.x86_64                         2:0.12.1.2-2.295.el6_3.1    @updates    
qemu-kvm.x86_64                         2:0.12.1.2-2.295.el6_3.1    @updates    
qemu-guest-agent.x86_64                 2:0.12.1.2-2.295.el6_3.1    updates     
qemu-kvm-tools.x86_64                   2:0.12.1.2-2.295.el6_3.1    updates    

br0 is created by brctl. There is not XML config as far as I am aware.

[root@node002 ~]# ifconfig br0
br0       Link encap:Ethernet  HWaddr 00:9C:02:24:1A:E0  
          inet addr:10.141.80.2  Bcast:10.141.255.255  Mask:255.255.0.0
          inet6 addr: fe80::29c:2ff:fe24:1ae0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:185129 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2094 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:8820359 (8.4 MiB)  TX bytes:123842 (120.9 KiB)

[root@node002 ~]# ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 00:02:C9:36:21:A1  
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

[root@node002 ~]# brctl show
bridge name	bridge id		STP enabled	interfaces
br0		8000.009c02241ae0	no		eth1
							vnet0
virbr0		8000.525400a6d5aa	yes		virbr0-nic
# This is the Cluster Manager PXE configuration file.
#
# Note that every boot option should specify 'IPAPPEND 3', otherwise the
# ramdisk will fail.
#
# An optional kernel parameter 'INSTALLMODE' can be used to force a certain
# installmode.
#
# The CMDaemon will generate additional kernel parameters (if configured)
# and insert them between the CMDS rdblacklist=nouveau CMDE markers.
#
# There is also a possibility to try and boot the next device in the BIOS
# boot order. It can be specified as:
#
# LABEL disk
#   localboot 0
#   MENU LABEL ^BOOT     - Boot next device in BIOS boot order.
#
# End of documentation, configuration follows:

LABEL linux
  KERNEL vmlinuz
  IPAPPEND 3
  APPEND initrd=initrd CMDS rdblacklist=nouveau CMDE
  MENU LABEL ^AUTO       - Normal node boot
  MENU DEFAULT

LABEL full
  KERNEL vmlinuz
  IPAPPEND 3
  APPEND initrd=initrd CMDS rdblacklist=nouveau CMDE INSTALLMODE=FULL CANCELBURN=1
  MENU LABEL ^FULL       - Force FULL install (cancels burn)
  MENU HIDE

LABEL main
  KERNEL vmlinuz
  IPAPPEND 3
  APPEND initrd=initrd CMDS rdblacklist=nouveau CMDE INSTALLMODE=MAIN CANCELBURN=1
  MENU LABEL MA^IN       - Drop to maintenance shell

LABEL newburn
  KERNEL vmlinuz
  IPAPPEND 3
  APPEND initrd=initrd CMDS rdblacklist=nouveau CMDE NEWBURN=1
  MENU LABEL NEW^BURN    - Force a new burn
  MENU HIDE

LABEL manburn
  KERNEL vmlinuz
  IPAPPEND 3
  APPEND initrd=initrd CMDS rdblacklist=nouveau CMDE NEWBURN=1 BURNMENUPAUSE=1 
  MENU LABEL ^MANBURN    - Force a new burn (no menu timeout)
  MENU HIDE

LABEL cancelburn
  KERNEL vmlinuz
  IPAPPEND 3
  APPEND initrd=initrd CMDS rdblacklist=nouveau CMDE CANCELBURN=1
  MENU LABEL ^CANCELBURN - Cancel the current burn
  MENU HIDE

LABEL RESCUE
  KERNEL kernel.rescue
  MENU LABEL ^RESCUE     - Start rescue environment
  APPEND vga=normal initrd=rescue.rootfs.cgz root=/dev/ram0 rw nokeymap

LABEL localdrive
  MENU LABEL ^DRIVE      - Boot from first hard drive
  KERNEL chain.c32
  APPEND hd0

LABEL MEMTEST
  KERNEL memtest
  MENU LABEL MEM^TEST    - Start Memtest86

LABEL MEMPLUS
  KERNEL memtestplus
  MENU LABEL MEM^PLUS    - Start Memtest86+

INCLUDE bios/menu.conf
INCLUDE mpxe/minstall.conf

DEFAULT menu.c32
PROMPT 0
TIMEOUT 50
MENU TITLE Cluster Manager PXE Environment
MENU BACKGROUND bootlogo.png
MENU COLOR sel          7;37;40    #ff94cc31 #ff303030 all
MENU COLOR hotsel       1;7;37;40  #ff94cc31 #ff303030 all
MENU COLOR unsel        37;44      #ff78af00 #00000000 std
MENU COLOR hotkey       1;37;44    #ff94cc31 #00000000 std
MENU COLOR border       30;44      #ff78af00 #00000000 std
MENU COLOR title        1;36;44    #ff78af00 #00000000 std
MENU COLOR tabmsg       31;40      #ff78af00 #00000000 std

[root@node002 ~]# tcpdump -vv -i br0 udp
tcpdump: listening on br0, link-type EN10MB (Ethernet), capture size 65535 bytes
17:39:24.212593 IP (tos 0x0, ttl 64, id 1, offset 0, flags [none], proto UDP (17), length 415)
    0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 00:00:00:00:00:0d (oui Ethernet), length 387, xid 0xd, Flags [none] (0x0000)
	  Client-Ethernet-Address 00:00:00:00:00:0d (oui Ethernet)
	  Vendor-rfc1048 Extensions
	    Magic Cookie 0x63825363
	    GUID Option 97, length 17: 0.79.3.176.155.232.52.187.243.166.194.22.137.243.21.110.242
	    Client-ID Option 61, length 7: ether 00:00:00:00:00:0d
	    T175 Option 175, length 45: 177.5.1.16.236.129.57.19.1.1.23.1.1.21.1.1.24.1.1.35.1.1.34.1.1.25.1.1.33.1.1.16.1.2.18.1.1.17.1.1.235.3.0.9.7
	    DHCP-Message Option 53, length 1: Discover
	    MSZ Option 57, length 2: 1472
	    ARCH Option 93, length 2: 0
	    NDI Option 94, length 3: 1.2.1
	    Vendor-Class Option 60, length 32: "PXEClient:Arch:00000:UNDI:002001"
	    CLASS Option 77, length 4: "gPXE"
	    Parameter-Request Option 55, length 13: 
	      Subnet-Mask, Default-Gateway, Domain-Name-Server, LOG
	      Hostname, Domain-Name, RP, Vendor-Option
	      Vendor-Class, TFTP, BF, Option 175
	      Option 203
17:39:24.212659 IP (tos 0x0, ttl 64, id 1, offset 0, flags [none], proto UDP (17), length 415)
    0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 00:00:00:00:00:0d (oui Ethernet), length 387, xid 0xd, Flags [none] (0x0000)
	  Client-Ethernet-Address 00:00:00:00:00:0d (oui Ethernet)
	  Vendor-rfc1048 Extensions
	    Magic Cookie 0x63825363
	    GUID Option 97, length 17: 0.79.3.176.155.232.52.187.243.166.194.22.137.243.21.110.242
	    Client-ID Option 61, length 7: ether 00:00:00:00:00:0d
	    T175 Option 175, length 45: 177.5.1.16.236.129.57.19.1.1.23.1.1.21.1.1.24.1.1.35.1.1.34.1.1.25.1.1.33.1.1.16.1.2.18.1.1.17.1.1.235.3.0.9.7
	    DHCP-Message Option 53, length 1: Discover
	    MSZ Option 57, length 2: 1472
	    ARCH Option 93, length 2: 0
	    NDI Option 94, length 3: 1.2.1
	    Vendor-Class Option 60, length 32: "PXEClient:Arch:00000:UNDI:002001"
	    CLASS Option 77, length 4: "gPXE"
	    Parameter-Request Option 55, length 13: 
	      Subnet-Mask, Default-Gateway, Domain-Name-Server, LOG
	      Hostname, Domain-Name, RP, Vendor-Option
	      Vendor-Class, TFTP, BF, Option 175
	      Option 203
17:39:24.212913 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 388)
    master.cm.cluster.bootps > 255.255.255.255.bootpc: [udp sum ok] BOOTP/DHCP, Reply, length 360, xid 0xd, Flags [none] (0x0000)
	  Your-IP vm001.cm.cluster
	  Server-IP master.cm.cluster
	  Client-Ethernet-Address 00:00:00:00:00:0d (oui Ethernet)
	  file "cm-images/default-image/boot/pxelinux.0"
	  Vendor-rfc1048 Extensions
	    Magic Cookie 0x63825363
	    DHCP-Message Option 53, length 1: Offer
	    Server-ID Option 54, length 4: master.cm.cluster
	    Lease-Time Option 51, length 4: 86400
	    Subnet-Mask Option 1, length 4: 255.255.0.0
	    Default-Gateway Option 3, length 4: master.cm.cluster
	    Domain-Name-Server Option 6, length 4: master.cm.cluster
	    Hostname Option 12, length 17: "vm001.internalnet"
	    Domain-Name Option 15, length 65: "eth.cluster brightcomputing.com ib.cluster ilo.cluster cm.cluster"
17:39:25.178728 IP (tos 0x0, ttl 64, id 2, offset 0, flags [none], proto UDP (17), length 415)
    0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 00:00:00:00:00:0d (oui Ethernet), length 387, xid 0xd, Flags [none] (0x0000)
	  Client-Ethernet-Address 00:00:00:00:00:0d (oui Ethernet)
	  Vendor-rfc1048 Extensions
	    Magic Cookie 0x63825363
	    GUID Option 97, length 17: 0.79.3.176.155.232.52.187.243.166.194.22.137.243.21.110.242
	    Client-ID Option 61, length 7: ether 00:00:00:00:00:0d
	    T175 Option 175, length 45: 177.5.1.16.236.129.57.19.1.1.23.1.1.21.1.1.24.1.1.35.1.1.34.1.1.25.1.1.33.1.1.16.1.2.18.1.1.17.1.1.235.3.0.9.7
	    DHCP-Message Option 53, length 1: Discover
	    MSZ Option 57, length 2: 1472
	    ARCH Option 93, length 2: 0
	    NDI Option 94, length 3: 1.2.1
	    Vendor-Class Option 60, length 32: "PXEClient:Arch:00000:UNDI:002001"
	    CLASS Option 77, length 4: "gPXE"
	    Parameter-Request Option 55, length 13: 
	      Subnet-Mask, Default-Gateway, Domain-Name-Server, LOG
	      Hostname, Domain-Name, RP, Vendor-Option
	      Vendor-Class, TFTP, BF, Option 175
	      Option 203
17:39:25.178784 IP (tos 0x0, ttl 64, id 2, offset 0, flags [none], proto UDP (17), length 415)
    0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 00:00:00:00:00:0d (oui Ethernet), length 387, xid 0xd, Flags [none] (0x0000)
	  Client-Ethernet-Address 00:00:00:00:00:0d (oui Ethernet)
	  Vendor-rfc1048 Extensions
	    Magic Cookie 0x63825363
	    GUID Option 97, length 17: 0.79.3.176.155.232.52.187.243.166.194.22.137.243.21.110.242
	    Client-ID Option 61, length 7: ether 00:00:00:00:00:0d
	    T175 Option 175, length 45: 177.5.1.16.236.129.57.19.1.1.23.1.1.21.1.1.24.1.1.35.1.1.34.1.1.25.1.1.33.1.1.16.1.2.18.1.1.17.1.1.235.3.0.9.7
	    DHCP-Message Option 53, length 1: Discover
	    MSZ Option 57, length 2: 1472
	    ARCH Option 93, length 2: 0
	    NDI Option 94, length 3: 1.2.1
	    Vendor-Class Option 60, length 32: "PXEClient:Arch:00000:UNDI:002001"
	    CLASS Option 77, length 4: "gPXE"
	    Parameter-Request Option 55, length 13: 
	      Subnet-Mask, Default-Gateway, Domain-Name-Server, LOG
	      Hostname, Domain-Name, RP, Vendor-Option
	      Vendor-Class, TFTP, BF, Option 175
	      Option 203
17:39:25.179009 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 388)
    master.cm.cluster.bootps > 255.255.255.255.bootpc: [udp sum ok] BOOTP/DHCP, Reply, length 360, xid 0xd, Flags [none] (0x0000)
	  Your-IP vm001.cm.cluster
	  Server-IP master.cm.cluster
	  Client-Ethernet-Address 00:00:00:00:00:0d (oui Ethernet)
	  file "cm-images/default-image/boot/pxelinux.0"
	  Vendor-rfc1048 Extensions
	    Magic Cookie 0x63825363
	    DHCP-Message Option 53, length 1: Offer
	    Server-ID Option 54, length 4: master.cm.cluster
	    Lease-Time Option 51, length 4: 86400
	    Subnet-Mask Option 1, length 4: 255.255.0.0
	    Default-Gateway Option 3, length 4: master.cm.cluster
	    Domain-Name-Server Option 6, length 4: master.cm.cluster
	    Hostname Option 12, length 17: "vm001.internalnet"
	    Domain-Name Option 15, length 65: "eth.cluster brightcomputing.com ib.cluster ilo.cluster cm.cluster"
17:39:27.156065 IP (tos 0x0, ttl 64, id 3, offset 0, flags [none], proto UDP (17), length 427)
    0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 00:00:00:00:00:0d (oui Ethernet), length 399, xid 0xd, Flags [none] (0x0000)
	  Client-Ethernet-Address 00:00:00:00:00:0d (oui Ethernet)
	  Vendor-rfc1048 Extensions
	    Magic Cookie 0x63825363
	    Requested-IP Option 50, length 4: vm001.cm.cluster
	    Server-ID Option 54, length 4: master.cm.cluster
	    GUID Option 97, length 17: 0.79.3.176.155.232.52.187.243.166.194.22.137.243.21.110.242
	    Client-ID Option 61, length 7: ether 00:00:00:00:00:0d
	    T175 Option 175, length 45: 177.5.1.16.236.129.57.19.1.1.23.1.1.21.1.1.24.1.1.35.1.1.34.1.1.25.1.1.33.1.1.16.1.2.18.1.1.17.1.1.235.3.0.9.7
	    DHCP-Message Option 53, length 1: Request
	    MSZ Option 57, length 2: 1472
	    ARCH Option 93, length 2: 0
	    NDI Option 94, length 3: 1.2.1
	    Vendor-Class Option 60, length 32: "PXEClient:Arch:00000:UNDI:002001"
	    CLASS Option 77, length 4: "gPXE"
	    Parameter-Request Option 55, length 13: 
	      Subnet-Mask, Default-Gateway, Domain-Name-Server, LOG
	      Hostname, Domain-Name, RP, Vendor-Option
	      Vendor-Class, TFTP, BF, Option 175
	      Option 203
17:39:27.156121 IP (tos 0x0, ttl 64, id 3, offset 0, flags [none], proto UDP (17), length 427)
    0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 00:00:00:00:00:0d (oui Ethernet), length 399, xid 0xd, Flags [none] (0x0000)
	  Client-Ethernet-Address 00:00:00:00:00:0d (oui Ethernet)
	  Vendor-rfc1048 Extensions
	    Magic Cookie 0x63825363
	    Requested-IP Option 50, length 4: vm001.cm.cluster
	    Server-ID Option 54, length 4: master.cm.cluster
	    GUID Option 97, length 17: 0.79.3.176.155.232.52.187.243.166.194.22.137.243.21.110.242
	    Client-ID Option 61, length 7: ether 00:00:00:00:00:0d
	    T175 Option 175, length 45: 177.5.1.16.236.129.57.19.1.1.23.1.1.21.1.1.24.1.1.35.1.1.34.1.1.25.1.1.33.1.1.16.1.2.18.1.1.17.1.1.235.3.0.9.7
	    DHCP-Message Option 53, length 1: Request
	    MSZ Option 57, length 2: 1472
	    ARCH Option 93, length 2: 0
	    NDI Option 94, length 3: 1.2.1
	    Vendor-Class Option 60, length 32: "PXEClient:Arch:00000:UNDI:002001"
	    CLASS Option 77, length 4: "gPXE"
	    Parameter-Request Option 55, length 13: 
	      Subnet-Mask, Default-Gateway, Domain-Name-Server, LOG
	      Hostname, Domain-Name, RP, Vendor-Option
	      Vendor-Class, TFTP, BF, Option 175
	      Option 203
17:39:27.156373 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 388)
    master.cm.cluster.bootps > 255.255.255.255.bootpc: [udp sum ok] BOOTP/DHCP, Reply, length 360, xid 0xd, Flags [none] (0x0000)
	  Your-IP vm001.cm.cluster
	  Server-IP master.cm.cluster
	  Client-Ethernet-Address 00:00:00:00:00:0d (oui Ethernet)
	  file "cm-images/default-image/boot/pxelinux.0"
	  Vendor-rfc1048 Extensions
	    Magic Cookie 0x63825363
	    DHCP-Message Option 53, length 1: ACK
	    Server-ID Option 54, length 4: master.cm.cluster
	    Lease-Time Option 51, length 4: 86400
	    Subnet-Mask Option 1, length 4: 255.255.0.0
	    Default-Gateway Option 3, length 4: master.cm.cluster
	    Domain-Name-Server Option 6, length 4: master.cm.cluster
	    Hostname Option 12, length 17: "vm001.internalnet"
	    Domain-Name Option 15, length 65: "eth.cluster brightcomputing.com ib.cluster ilo.cluster cm.cluster"
> 
> -- 
> Regards,     
> Alex
> 
> 
> ----- Original Message -----
> From: "Andrew Holway" <a.holway@xxxxxxxxxxxx>
> To: kvm@xxxxxxxxxxxxxxx
> Sent: Thursday, August 16, 2012 8:25:35 PM
> Subject: [libvirt-users] vm pxe fail
> 
> Hallo
> 
> I have a kvm vm that I am attempting to boot from pxe. The dhcp works perfectly and I can see the VM in the pxe server arp. but the tftp just times out. I don't see any tftp traffic on either the physical host or on the pie server. I am using a bridged interface. I have tried using several virtual nic drivers, several different mac addresses and several different ips.  on the physical host I can get the pxelinux.0 file from the pxe server via tftp and can clearly see that traffic with tcpdump.
> 
> Ive tried using various virtual interfaces.
> 
> I can pxe boot my physical hosts with no problems.
> 
> I can tftp fine from the physical host and see the traffic with ethdump
> 
> Here is the terminal output from the VM: https://dl.dropbox.com/u/98200887/Screen%20Shot%202012-08-15%20at%206.41.12%20PM.png
> 
> Thanks,
> 
> Andrew
> 
> [root@node002 ~]# yum list | grep qemu
> gpxe-roms-qemu.noarch                   0.9.7-6.9.el6               @base       
> qemu-img.x86_64                         2:0.12.1.2-2.295.el6_3.1    @updates    
> qemu-kvm.x86_64                         2:0.12.1.2-2.295.el6_3.1    @updates    
> qemu-guest-agent.x86_64                 2:0.12.1.2-2.295.el6_3.1    updates     
> qemu-kvm-tools.x86_64                   2:0.12.1.2-2.295.el6_3.1    updates 
> 
> [root@node002 ~]# ethtool eth0
> Settings for eth0:
> 	Supported ports: [ TP ]
> 	Supported link modes:   10000baseT/Full 
> 	Supports auto-negotiation: No
> 	Advertised link modes:  10000baseT/Full 
> 	Advertised pause frame use: No
> 	Advertised auto-negotiation: No
> 	Speed: Unknown!
> 	Duplex: Unknown! (255)
> 	Port: Twisted Pair
> 	PHYAD: 0
> 	Transceiver: internal
> 	Auto-negotiation: off
> 	MDI-X: Unknown
> 	Supports Wake-on: g
> 	Wake-on: g
> 	Current message level: 0x00000014 (20)
> 	Link detected: no
> 
> [root@node002 ~]# brctl show
> bridge name	bridge id		STP enabled	interfaces
> br0		8000.009c02241ae0	no		eth1
> 							vnet0
> virbr0		8000.525400a6d5aa	yes		virbr0-nic
> 
> [root@node002 ~]# ethtool vnet0
> Settings for vnet0:
> 	Supported ports: [ ]
> 	Supported link modes:   
> 	Supports auto-negotiation: No
> 	Advertised link modes:  Not reported
> 	Advertised pause frame use: No
> 	Advertised auto-negotiation: No
> 	Speed: 10Mb/s
> 	Duplex: Full
> 	Port: Twisted Pair
> 	PHYAD: 0
> 	Transceiver: internal
> 	Auto-negotiation: off
> 	MDI-X: Unknown
> 	Current message level: 0xffffffa1 (-95)
> 	Link detected: yes
> 
> <domain type='kvm'>
> <name>vm004</name>
> <uuid>4f03b09b-e834-bbf3-a6c2-1689f3156ef2</uuid>
> <memory unit='KiB'>2097152</memory>
> <currentMemory unit='KiB'>2097152</currentMemory>
> <vcpu placement='static'>2</vcpu>
> <os>
>   <type arch='x86_64' machine='rhel6.3.0'>hvm</type>
>   <boot dev='hd'/>
> </os>
> <features>
>   <acpi/>
>   <apic/>
>   <pae/>
> </features>
> <clock offset='utc'/>
> <on_poweroff>destroy</on_poweroff>
> <on_reboot>restart</on_reboot>
> <on_crash>restart</on_crash>
> <devices>
>   <emulator>/usr/libexec/qemu-kvm</emulator>
>   <disk type='file' device='disk'>
>     <driver name='qemu' type='raw' cache='none'/>
>     <source file='/cm/shared/vm/vm004.img'/>
>     <target dev='hda' bus='ide'/>
>     <address type='drive' controller='0' bus='0' target='0' unit='0'/>
>   </disk>
>   <disk type='block' device='cdrom'>
>     <driver name='qemu' type='raw'/>
>     <target dev='hdc' bus='ide'/>
>     <readonly/>
>     <address type='drive' controller='0' bus='1' target='0' unit='0'/>
>   </disk>
>   <controller type='usb' index='0'>
>     <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
>   </controller>
>   <controller type='ide' index='0'>
>     <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
>   </controller>
>   <interface type='bridge'>
>     <mac address='00:00:00:00:00:0d'/>
>     <source bridge='br0'/>
>     <model type='rtl8139'/>
>     <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
>   </interface>
>   <serial type='pty'>
>     <target port='0'/>
>   </serial>
>   <console type='pty'>
>     <target type='serial' port='0'/>
>   </console>
>   <input type='mouse' bus='ps2'/>
>   <graphics type='vnc' port='-1' autoport='yes'/>
>   <video>
>     <model type='cirrus' vram='9216' heads='1'/>
>     <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
>   </video>
>   <memballoon model='virtio'>
>     <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
>   </memballoon>
> </devices>
> </domain>
> 
> 
> 
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