Hello, I am experimenting with delivering IPv6 multicast traffic over the WRT54GS, running OpenWRT. OpenWrt is currently running linux-2.4.30 for the mipsel architecture and the OpenWRT distribution has bridged the 4 port LAN switch (vlan0) with the WLAN interface (eth1) by default. On the IP layer both devices are represented via the br0 interface. The bridge work fine for IPv4 Unicast and Multicast and for IPv6 Unicast but not for IPv6 multicast. I went into a problem with forwarding the MLDv2_report message over the bridge from a mobile client, connected over WLAN. The MLDv2 report messages are received in in the eth1 (WLAN IF), but not in the eth0 nore in the br0 interface. Does the bridge support IPv6 multicast compliant MAC addresses, starting with 3333+LowByte(Ipv6 MulticastAddress) ? Usually a bridge is working on L2 and should forward any ICMPv6 packages .? The bridge is forwarding any other IPv6 traffic without problems e.g. ICMPv6 messages generated with ping6. MLDv2 report messages are a subset of IPv6 ICMP messages with the link local IPv6 multicast address FF02::16 ( all MLDv2 compliant router) as destination address. The same behavior I figured out with the MLDv2 query messages, sent by the Multicast router to all nodes (FF02::1) on the local link. The MLD query I have seen at the eth0 IF but not at the wireless link. Any other IPv6 link local multicast adresses are forwarded e.g. IPv6 router advertisements or neighbour soicitation messages. Do you have any idea, how to solve the problem ?? with best regards Olaf -- Dipl. Ing. Olaf Menzel - System Engineer FOKUS - Fraunhofer Institute for Open Communication Systems: - Competence Center for Advanced Satellite Communication Schloss Birlinghoven, 53754 Sankt Augustin, Germany Phone: +49-2241-14-3494 Mobile: +49-175-2616161 Fax:+49-2241-14-43494 email: olaf.menzel@xxxxxxxxxxxx Internet: http://www.fokus.fhg.de/satcom
