[c-nsp] 6500 dbus usage

[Jon Marshall]

Thanks  Peter
 
If they do have dbus connectors then why are they not supported with a sup32. I thought it was a physical connectivity issue but apparently not. So is it just a performance decision made by Cisco ? 
 
Jon
 

> Subject: Re: [c-nsp] 6500 dbus usage
> From: peter at rathlev.dk
> To: jms.123 at hotmail.co.uk
> CC: cisco-nsp at puck.nether.net
> Date: Tue, 20 Sep 2011 16:15:38 +0200
> 
> 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
> 
>