Linux KVM (virt) with DHCP and bridging
Serge van Ginderachter
serge at vanginderachter.be
Wed Apr 21 06:48:22 UTC 2010
On 21 April 2010 03:27, <mailers at oranged.to> wrote:
>
> 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?
Check that your interface is in forwarding state with command:
brctl showstp br0
If it isn't you might have forgotten to make sure you also have this in the
interfaces file:
auto eth0
iface eth0 inet manual
--
Met vriendelijke groet,
Serge van Ginderachter
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ubuntu.com/archives/ubuntu-server/attachments/20100421/9861a5c9/attachment.html>
More information about the ubuntu-server
mailing list