[c-nsp] Cisco 6509 and Bus speeds

[Mikael Abrahamsson]

On Thu, 13 Jan 2005, Tim Stevenson wrote:

> This card is not fully non-blocking, but it is nearly (like >98%) line
> rate on all 4 ports with large packets. You can't ever get full 40G wire
> ethernet across the fabric, as we add 32 bytes of overhead to every
> packet.  Also, the fwding engine is the bottleneck at 64B packets, ie,
> either the sup (30Mpps) or a DFC3 (48Mpps) has less capacity than 4x10G
> ports (60Mpps).

But in the case of i-mix (avg 300 byte packets) it's able to do at least 
90% of all ports? Is there any combination of ports that are bundled 
together asic-wise or channelwise on the 6704, or are all ports equal in 
respect to each other?
 
-- 
Mikael Abrahamsson    email: swmike at swm.pp.se