Work on a promiscuous mode IP packet forwarder that runs on
vscn15 is complete. This forwarder
allows the encapsulated IP multicast packets being sent by the
mbone machine to sunmed to be picked up and then unicast to a
workstation CUMBONE client (axcn01.cern.ch) inside the CERN LAN.
This is done by first removing the encapsulation header put there
for the tunnel, and then replacing the IP multicast destination
address in the resulting packet by the IP address of the CUMBONE
recomputing the header checksum, and specifying the
Ethernet address of the client in the packet header,
the packet is sent back out on the
network and is thus received by the client. In a production environment
the packet would be sent out on a different adapter, preferably FDDI,
directly connected to the main CERN backbone.