Greetings, This may be the problem that I have seen (and reported) previously... http://oss.sgi.com/projects/netdev/archive/2004-02/msg00442.html One suggestion.. do a packet dump on an outgoing bridge port, and a dump from a transmitting machine connected to the bridge. Compare the MD5 checksums. Regards, Paul On Mon, 2005-01-10 at 20:49 +0100, Gergely Madarasz wrote: > On Mon, Jan 10, 2005 at 02:41:34PM -0500, Neil Horman wrote: > > Gergely Madarasz wrote: > > >On Mon, Jan 10, 2005 at 12:40:57PM -0500, Neil Horman wrote: > > > > > >>Gergely Madarasz wrote: > > >> > > >>>On Mon, Jan 10, 2005 at 11:04:55AM -0500, Neil Horman wrote: > > >>> > > >>> > > >>>>Strange. My concern was that the tg3 interface has its hardware reset > > >>>>whenever its set to be up, and part of that is a resetting of its > > >>>>receive mode. If for some reason IFF_PROMISC was cleared after you set > > >>>>it using brctl, the interface might be taken out of promisc mode. Do > > >>>>you have any iptables rules running that might drop bpdus? > > >And it is probably not a driver-only issue. I've got older machines with > > >tg3 running fine with bridge (with an older tg3 driver), and eth1 on the > > >same machine also runs fine. On another machine I tested today, an IBM > > >x326, the same thing happens - eth0 broken, eth1 fine. Would access to one > > >of these machines help? :) > > > > > >Greg > > I've got a tg3 card here. I'll try re-create it as soon as I have time. > > Sounds great, but I expect it will not occur with a random tg3 card, > explained above...