[Bridge] F13 bridge issues

Mark Liggett mliggett at btisystems.com
Wed Oct 13 09:14:22 PDT 2010

Thanks Stephen,

My set up is as follows:

client -> eth2-eth3 -> cisco switch

The client is directly connected to eth2 on the bridge, eth3 is directly connected to a cisco switch.  The port on the cisco has spanning-tree disabled (with 'spanning-tree bpduguard enable') won't won't allow any bpdu's to or from the port.  The cisco or the client don't report any errors or show abnormal stats - the communications just stop.  The ports stay link up but no traffic can flow until the server is rebooted.

After I enabled STP on the bridge I got the same issue (I had to remove the spanning-tree bpduguard from the switch port as it goes to err-disabled otherwise).

Kind regards,


On 13/10/2010 16:46, "Stephen Hemminger" <shemminger at linux-foundation.org> wrote:

On Wed, 13 Oct 2010 11:27:18 -0400
Mark Liggett <mliggett at btisystems.com> wrote:

> Hi everyone,
> I'm using Ethernet bridging on an up-to-date F13 system.  I've created a bridge adapter br0 and added eth2 and eth3 to it.  Everything works as expected for a short time before the 2 Ethernet cards used in the bridge start reporting millions of errors.  I confirmed this is the case on 2 separate systems (although both systems use Intel NICs).  To try to resolve this I've:
> - Compiled and installed the latest Intel igb driver 2.3.4
> - Installed the latest Fedora kernel
> - Uninstalled the standard bridge-utils 1.2-9, before compiling and installing version 1.4
> I've pastebin'd the system config here:  http://pastebin.ca/1960777
> You can see the errors listed on eth2 and eth3.  I've tried both setting the bridge up using /etc/sysconfig/network-scripts as well as manually (using brctl and ifconfig).
> My bridge/Ethernet interface configs are listed here: http://pastebin.ca/1960790
> Any suggestions would be greatly appreciated.
> Thanks,
> Mark

You might also be creating a packet loop?
Turn on spanning tree and find out.


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