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,

Mark



On 13/10/2010 16:46, "Stephen Hemminger" <[email protected]> 
wrote:

On Wed, 13 Oct 2010 11:27:18 -0400
Mark Liggett <[email protected]> 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 2.6.34.7-56
> - 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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