Hello, I'm having a problem getting two (working) NICs enslaved to a bridge to both work in the bridge. The setup is just for testing and looks like this: (NETWORK)-------|bridge|---------|test PC| I'm building a bridge from an old Dell Optiplex GX1 desktop. Using kernel-2.6.9-gentoo-r4, with bridging and ebtables compiled into the kernel; the two PCI NICs are Intel, and the e100 module compiled, installed, and works fine (tested both NICs with DHCP and got network access w/o a problem). Also installed the bridge-tools with emerge. (FWIW, The test PC is also an old Dell Optiplex GX1, running Fedora 3.) So far so good. I create the bridge: brctl addbr br0 brctl stp br0 off brctl addif eth0 brctl addif eth1 ifconfig eth0 0.0.0.0 down ifconfig eth1 0.0.0.0 down ifconfig eth0 0.0.0.0 up ifconfig eth1 0.0.0.0 up ifconfig br0 up 'brctl show' shows there is an interface br0 with eth0 and eth1 enslaved to it. ebtables (& iptables) rules are all set to ACCEPT packets/frames across the bridge. Now, the Problem: I connect the eth1 interface to the network side, and the eth0 interface to the testPC side. The eth1 NIC lights go green and it's connected to the network. eth0, connected to my test PC, does NOTHING. On the test PC, I 'ifdown eth0' and 'ifup eth0' but get the result: "no link present. Check cable?" The test PC eth0 is configged to get an IP via DHCP, and does so without a problem without the bridge in between. A quick look at dmesg on the bridge shows the following: device eth0 entered promiscuous mode device eth1 entered promiscuous mode e100: eth1: e100_watchdog: link up, 100Mbps, full-duplex br0: port2(eth1) entering learning state br0: topology change detected, propogating br0: port2(eth1) entering forwarding state All that looks fine for eth1. But after eth0 enters promiscuous mode, it never enters a learning state, and never a forwading state. What I've tried so far: * echo "1" > /proc/sys/net/ipv4/ip_forward * Checked for IRQ conflicts w/ the NICs. * Moved NICs to different PCI slots * switched cable so network side is in eth0, local side on eth1. Same results as above but reversed, i.e. eth1 then has the problem, and eth0 connects to the network, but eth1 just sits there. Totally stumped on this especially since I've set up a bridge before with similar hardware. Any help is *greatly* appreciated. Thanks -Mike Michael Hurley Webmaster/SysAdmin University of Connecticut School of Law mhurley@xxxxxxxxxxxxx (860) 570-5233
