Hi. I've been searching all over for a solution to my problem, but I just
can't seem to find one. So I'm going to see if anyone on this list can
help me out.
I've been trying to set up an ethernet bridge on a Linux 2.4.18 kernel for
several days now. The kernel has the netfilter option turned on and have
also applied the patch available at
bridge.sourceforge.net/devel/bridge-nf/bridge-nf-0.0.6-against-2.4.18.diff
and enabled both bridging and bridge-netfilter support. I'm using
version 0.9.5 of the bride-utils. Until I get the bridge to work, I won't
be adding any rules to any of the iptables chains.
The machine I'm trying to use as a bridge has two gigabit ethernet cards
whose drivers are compiled as modules (thier driver, bc5700.o, is not
included in the mainstream kernel yet.) The two cards are eth1 and eth2.
eth1 is connected to a 100Mbit switch (soon to be upgraded to gigabit) and
eth2 is connected to a gigabit switch. When I boot the kernel without
configuring a bridge, I can communicate through both interfaces just
fine. When I start the bridge, the bridge machine can no longer communicate
with anybody, and traffic does not flow across the bridge. Here's the
series of commands I use to start the bridge:
brctl addbr br0
ifconfig eth1 0.0.0.0 promisc up
ifconfig eth2 0.0.0.0 promisc up
brctl addif br0 eth1
brctl addif br0 eth2
ifconfig br0 X.X.X.154 netmask 255.255.255.128 broadcast X.X.X.255 \
promisc up
route add default gw X.X.X.129
After executing those commands, the interface br0 shows up in ifconfig.
Executing brctl showstp shows:
br0
bridge id 8000.00047630877c
designated root 8000.00047630877c
root port 0 path cost 0
max age 20.00 bridge max age 20.00
hello time 2.00 bridge hello time 2.00
forward delay 15.00 bridge forward delay 15.00
ageing time 300.00 gc interval 4.00
hello timer 1.07 tcn timer 0.00
topology change timer 15.07 gc timer 1.07
flags TOPOLOGY_CHANGE TOPOLOGY_CHANGE_DETECTED
eth1 (1)
port id 8001 state forwarding
designated root 8000.00047630877c path cost 100
designated bridge 8000.00047630877c message age timer 0.00
designated port 8001 forward delay timer 0.00
designated cost 0 hold timer 0.00
flags
eth2 (2)
port id 8002 state forwarding
designated root 8000.00047630877c path cost 100
designated bridge 8000.00047630877c message age timer 0.00
designated port 8002 forward delay timer 0.00
designated cost 0 hold timer 0.00
flags
Additionally, brctl showmacs shows that the bridge is recognizing the two
macs in the machine and several non-local macs. Trouble is, nobody seems
to be getting through.
So, thats my predicament. Am I missing something? Does anybody have any
suggestions? Thanks in advance for your help.
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Stephen P Molloy ____ ____
U-M College of Engineering (CompE) [ \ / ]
[EMAIL PROTECTED] | \/ |
http://www-personal.engin.umich.edu/~smolloy | |\ /| |
[____]\/[____]
"We are what we repeatedly do. Excellence, therefore, is a habit."
-Aristotle
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