This paper on the 6500 Architecture is good:
http://www.cisco.com/warp/public/cc/pd/si/casi/ca6000/prodlit/k6kfy_wp.htm
except it completely ignores exactly this scenario.
Presumably the header compresssion used to send packet headers over the
switching bus
when switching packets between fabric cards is disabled when mixing with
non-fabric cards?
This would pull performance down to something like Supervisor1/PFC
performance of 15Mpps.
If you use Distributed forwarding on the fabric cards you may of course
achieve higher switching speeds,
when switching between fabric cards.
--Erik
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