[c-nsp] 6500 dbus usage

[Peter Rathlev]

On Tue, 2011-09-20 at 14:12 +0100, Jon Marshall wrote:
> 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 ? 

They do have DBus connectors. Even the WS-X6708-10G-3C, even though the
diagram doesn't show it.

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/prod_white_paper0900aecd80673385.html#wp9000639
 
> 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 ? 

AFAIK it will not impact the performance of traffic staying on
fabric-enabled cards.

(I'm not aware of any changes the Sup2T might introduce here.)

-- 
Peter