What is the anticipated traffic level?
The traffic anticipated during IETF multicasts is 100-300Kb/s, so 500Kb/s seems like a reasonable design bandwidth. Between IETF meetings, most of the time there will probably be no audio or video traffic, though some of the background session/control traffic may be present. A guess at the peak level of experimental use might be 5 simultaneous voice conversations (64Kb/s each). Clearly, with enough simultaneous conversations, we could exceed any bandwidth number, but 500Kb/s seems reasonable for planning. Note that the design bandwidth must be multiplied by the number of tunnels passing over any given link since each tunnel carries a separate copy of each packet. This is why the fanout of each mrouted node should be no more than 5-10 and the topology should be designed so that at most 1 or 2 tunnels flow over any T1 line. While most MBONE nodes should connect with lines of at least T1 speed, it will be possible to carry restricted traffic over slower speed lines. Each tunnel has an ass
