[ipxe-devel] Problem with iPXE in VirtualBox

Mircea Vutcovici mirceavutcovici at gmail.com
Fri May 6 02:44:15 BST 2011

Hi Michael,

The previous capture has the packets truncated.
I've made another test and the capture is attached.

On Thu, May 5, 2011 at 9:34 PM, Mircea Vutcovici
<mirceavutcovici at gmail.com> wrote:
> Hi Michael,
> Thank you for your answer. I've tested with static IP and I can not
> It seems that iPXE inside VirtualBox is not receiving the packets even
> if I can see the packets on the host machine.
> From the OpenWRT after I've set the IP:
> root at MiniMot:~# ping
> PING ( 56 data bytes
> ^C
> --- ping statistics ---
> 4 packets transmitted, 0 packets received, 100% packet loss
> root at MiniMot:~# arp|egrep '|IP'
> IP address       HW type     Flags       HW address            Mask     Device
>    0x1         0x0         08:00:27:b0:ff:0f     *        br-lan
> root at MiniMot:~#
> The capture is done from the OpenWRT router (that has the dnsmasq with
> TFTP and DHCP server) with the following command:
> tcpdump -w iPXE-DHCP-problem-2.cap ether host 08:00:27:b0:ff:0f
> On Thu, May 5, 2011 at 1:45 PM, Michael Brown <mbrown at fensystems.co.uk> wrote:
>> On Thursday 05 May 2011 04:09:36 Mircea Vutcovici wrote:
>>> I am trying to use iPXE in a VM running in VirtualBox. The problem is
>>> that iPXE can not get DHCP.
>>> I am using the latest version of iPXE
>>>  (b6cad3c0eb72e99d8ae5e6944ec8e9b7c5acecfa) VirtualBox 4.0.6 r71344
>>> Ubuntu 11.4 64bit
>>> The DHCP/tftp server is OpenWRT Backfire (10.03.1-rc4, r24045)
>>> dnsmasq --version
>>> Dnsmasq version 2.55  Copyright (c) 2000-2010 Simon Kelley
>>> Compile time options IPv6 GNU-getopt no-DBus no-I18N DHCP TFTP
>>> Here is the dnsmasq configuration (I've removed dhcp-host entries):
>>> /usr/sbin/dnsmasq -K -D -f -y -Z -b -E --enable-tftp -s lan -S /lan/
>>> -l /tmp/dhcp.leases -r /tmp/resolv.conf.auto --tftp-root /tftproot
>>> --dhcp-boot undionly.kkpxe --stop-dns-rebind
>>> --dhcp-range=lan,,,,12h -2
>>> 'eth1'
>>> Attached is the capture made with:
>>> tshark -w /tmp/iPXE-DHCP-problem.cap -pi eth1 port bootpc or port tftp
>>> If I boot from a physical computer, I have no problems. I do not
>>> understand why iPXE is not receiving the DHCP responses.
>> I can tell from the packet trace that iPXE's DHCP client believes that it
>> hasn't received any DHCPOFFERs, since bits 0 and 1 of the "secs" field are
>> always zero.  (Inspired by this, I've also just added code that will enable me
>> to tell from a packet trace whether or not iPXE has received any packets at
>> all.)
>> There are some helpful hints (some of which are new) on the relevant error
>> page:
>>  http://ipxe.org/4c106035
>> What does "ifstat" show after the failed DHCP attempt?
>> What happens if you try a static IP address?
>> Michael
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