Re: [libvirt-users] vm pxe fail

[Alex Jia <ajia@redhat.com>]

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)

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.

-- 
Regards,     
Alex


----- Original Message -----
From: "Andrew Holway" <a.holway@syseleven.de>
To: kvm@vger.kernel.org
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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