On Tue, 31 May 2005 21:17:17 +0200 Louis Croisez <louis.croisez@xxxxxxxxx> wrote: > Hi Stephen, > first of all, thx for helping me :o) > > 2005/5/31, Stephen Hemminger <shemminger@xxxxxxxx>: > > > > On Mon, 30 May 2005 11:38:59 +0200 > > Louis Croisez <louis.croisez@xxxxxxxxx> wrote: > > > > > Hi, > > > i want to implement the bridging feature on an arm (cpu intel ixp425), > > > running busybox+linux kernel 2.6.11. > > > For this, I have recompiled the kernel to enable bridging and ebtables, > > and > > > I have compiled and installed brctl utility for arm. > > > > > > Here is my network setup: > > > [PC_A] eth0 10.0.0.10/24 <http://10.0.0.10/24> ======== eth0 --+-- eth1 > > ======== [PC_B] eth0 10.10.0.1/24 <http://10.10.0.1/24> > > > | > > > br0 > > > [ARM] > > > > What is IP address of bridge? (br0) or do you not > > want the ARM box to be IP accessible? > > > It is not well sure that the bridge is to be accessible. But it is not > forbidden. In fact, a requirement is that the bridge worked with or without > IP address on br0 iface. On my linux bridge test box, whether to have or not > an IP on br0 does not makes the difference. > > > > > > Here is how I setup my bridge on the ARM: > > > brctl addbr br0 > > > brctl addif br0 eth0 > > > brctl addif br0 eth1 > > > brctl setfd br0 1 > > why set forwarding delay so low, please don't > > > Could please you explain me the consequence of setting this parameter too > low? > > > ifconfig eth0 promisc > > Don't do this you don't need to, unless something is > > broken in driver. > > > I am currently debugging. To have idea of where is the network packet in the > stack, I use the ebtables/iptables log feature, that show the traject of a > packet. > Here is the result of my last test. > Goal: > [PC_A] ping [PC_B] thru [ARM]. > Result: > icmp request is even not sent, because first an arp request is broadcast on > the lan to resolve PC_B hw address. Problem is that this arp request never > reach PC_B. It is stopped inside ARM. > Here is the path followed by this packet: > ebt:BRoute:BRouting > ebt:Nat:PreRouting > ipt:Mangle:PreRouting > ipt:Nat:PreRouting > ebt:Filter:Input > Does the bridge without any ebtables or iptables filtering at all? That is might be where the problem is.
