On Wed, 9 Nov 2005 09:35:54 -0600 "Andre Beliveau (QB/EMC)" <andre.beliveau@xxxxxxxxxxxx> wrote: > Hi, > > I'm trying to bridge a WLAN interface to a Wired interface on a WRTG54GS. > I'm using openwrt package. What kernel are they using? are they doing any filtering with ebtables? > I want to let EAPol messages go through the bridge but it does not work. > > EAPOL start message uses as destination mac 01:80:c2:00:00:03. If I run > tcpdump on the > Wireless interface I can see the packet come in. But it never gets out on > the network interface. That is a spanning tree multicast message, so the bridge will consume it itself (since it is a member of the spanning tree). The bridge generates its own STP hello messages as well. See http://www.iana.org/assignments/ethernet-numbers Multicast Addresses: 01-80-C2-00-00-00 -802- Spanning tree (for bridges) > I wrote a program to listen in promisc. mode and send back the packet toward > the outgoing interface > (vlan0) and I can see the packet in tcpdump on vlan0 interface now. > > The problem is that even if I see the packet in tcpdump on vlan0 (and I even > tried to send it to eth0 with > the same results) I don't see the packet transmitted on the wire. > > I am running ethereal on a client pc connected to a lan port and nothing > shows up on ethereal. > > If I change the destination address to another multicast address > (01:80:c3:00:00:03) instead, the > Packet goes through and reaches my client PC and I can see the packet in > Ethereal. > > Question: What do I have to do to let packets with d-mac 01:80:c2:00:00:03 > through the switch/bridge/firewall/ you would be better off turning STP on on the bridge and have it generate it's own STP messages. -- Stephen Hemminger <shemminger@xxxxxxxx> OSDL http://developer.osdl.org/~shemminger
