Hello,
I have been having an extensive problem which I have been bang my head against
for weeks. I have a system which I have multi-boot where my default boot is
ubuntu. I have all the virtualization installed and running with a few major
headaches. The environment is a corporate network where we can't use static
IP's. So I have the DHCP setup to work. If I boot the system with Windows 7 or
just native Linux it tends to get an IP address first go. However when I boot
into the virtualized environment which has a bridge setup it rarely if ever
gets an IP address and all of the virtual machines running on that system also
don't get IP addresses.
The bridge is setup like so in /etc/network/interfaces
auto br0
iface br0 inet dhcp
pre-up /usr/sbin/ethtool -s eth0 speed 100 duplex full autoneg off
bridge_ports eth0
bridge_fd 9
bridge_hello 2
bridge_maxage 12
bridge_stp off
Which all seems fine.. the link state is all fine there are no errors on the
switch. But we still can't get an IP address despite it working perfectly in
Windows 7 or default Linux. There are no iptables rules or anything like that
which would possibly cause problems. If I run
sudo tcpdump -i br0 -vvv -s0 ether host 54:52:00:22:d7:8f
I can see that the DHCP requests are going out without any problems but I
generally get an IP Address assigned then followed by a NAK. I've disabled the
DHCP server and installed a variety of other dhcp servers to identify where the
problem is and I get the same problems no matter what the configuration is..
Has anyone seen similar issues or knows where I can start to look further to
diagnose the problems?
Any assistance or advice would be really appreciated.
Regards,
Jimmy.
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