[c-nsp] 6500 fabric switching mode ??

[Mack McBride]

It forces the chassis to truncated mode which can reduce the performance of the chassis.
But that only applies in high packet rates.
It also opens the chassis to bus stalls if the blade has to be replaced.

LR Mack McBride
Network Architect

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Jeffrey G. Fitzwater
Sent: Monday, October 31, 2011 1:00 PM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] 6500 fabric switching mode ??

Will the switching processor or routing processor on a sup720-3B incur more CPU load if its switching mode is BUS vs dCEF?

It looks like it would be best for me to upgrade mod 3 to something that supports a fabric connection.


If I run "show fabric switching-mode" on 6513 I get the following...


Note the sup runs in BUS mode because of the non-fabric module in slot 3....


----------------------------------------------------------------------

Global switching mode is Truncated
dCEF mode is not enforced for system to operate
Fabric module is not  required for system to operate
Modules are allowed to operate in bus mode
Truncated mode is allowed

Module Slot     Switching Mode
   1                 Crossbar
   2                 Crossbar
   3                      Bus
   4                 Crossbar
   5                 Crossbar
   6                 Crossbar
   7                      Bus
   9                     dCEF
   10                    dCEF
   11                Crossbar
   12                    dCEF
   13                Crossbar

----------------------------------------------------------------------


Any comments please...



Jeff Fitzwater
OIT Network Systems
Princeton University
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