I thought i understood 6500 architecture but after reading some of the posts on
here now am not so sure !
My understanding was you basically had -
1) classic linecards - only connect to shared 32Gbps bus eg. WS-X61xx/63xx
2) fabric enabled - connections to both shared bus and crossbar switch fabric
eg. WS-X65xx
3) fabric only - only has connections to switch fabric eg. WS-X67xx
It's 3) i am confused about. The 67xx won't work with the sup32 and i always
thought that was because these modules didn't have connectors to the shared
32Gbps bus and the sup32 only provides a connection to the 32Gbps bus.
My confusion is when i read on here that when the 67xx modules are running in
CFC mode they send a portion of the packet (depending on compact/truncated
mode) across the 32Gbps bus to the supervisor for a forwarding decision to be
made. But if they don't have connectors to the 32Gbps bus then how do they
access it ?
As a further question, assuming they do send lookups across the shared bus then
having classic linecards using the same bus could have a direct impact on the
performance of the 67xx modules ?
Could someone clarify this please
Jon
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