I looked up the 10gigabit datasheet for the 6500's but it doesn't have anything in terms of oversubscription. It only states that Port Buffers for the 6704 is 16mb while the 6708 is 200mb.
1) What do port buffers mean
2) Do these modules have groups of ports connected to a single ASIC similar to the 6548 modules which connect ports 1-8 to one ASIC and so on.
3) Or is it as simple as considering that since both these modules have 40gb connections to the backplane, the 6704 provides 10gb to each port, hence no oversubscription while the 6708 has 8 ports which totally have to share 40gbps hence an oversub of 2:1
My final application for this is to link up my distribution switches to the core