Hi, I have a cisco 2811 and running IPv6 MLD. Currently, I configured ethernet and PPP-Sync interfaces for IPv6 multicast. Each interface has a host connected. My problem is when I send multicast traffic from Ethernet to Serial. Everything works, but when sending from Serial to Ethernet, my ethernet host cannot receive traffic. I double check that there is no firewall setup. Can you anyone think of why it only work on one direction, not both?