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/s... (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(a)syseleven.de&gt; To: kvm(a)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.... 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> _______________________________________________ libvirt-users mailing list libvirt-users(a)redhat.com https://www.redhat.com/mailman/listinfo/libvirt-users