[c-nsp] WS-X6724/6748 optimization

[Tim Stevenson]

Doh! Thought this was an internal email :) <blush>

To elaborate, 6748-GETX is as you say, 1-12, 13-24, etc. The port 
mapping for the fiber version of 6748, and for 6724, is a bit 
different, it is even & odd (so eg, 1-23 odd, 2-24 even, etc) but yes 
it is 12 ports per rohini in all cases.

WRT oversubscription, again, the oversub is at the fabric level, not 
the port level as you would see on some 4500 series cards & on the 
6500 series 6148-GETX etc.

The 67xx GE cards are the highest-performance GE cards available on 6500 today.

Tim

At 01:50 PM 1/18/2007 -0800, Tim Stevenson noted:
>The port mapping for these cards is here:
>http://bock-bock.cisco.com/~tstevens/FAQs/module-asic-mappings.html
>
>There is no oversubscription built in to the Rohini-Janus 
>interconnect. The oversubscription on these cards is from janus to 
>the fabric. Also intra Janus there is a 26Mpps limitation.
>
>Tim
>
>At 04:39 PM 1/18/2007 -0500, Jeff Kell noted:
>>Having learned blade specific configuration considerations "after 
>>the fact" in the past with regard to port/ASIC mapping and 
>>throughput limits (e.g., WS-X6348 with 4 COIL ASICs, ports 1-12, 
>>13-24, 25-36, 37-48) I thought I would ask in advance of setting up 
>>configurations on these blades for etherchannel performance.  For 
>>example, on cards like the WS-X4448, no sense in doing gigabit 
>>etherchannel on ports of the same ASIC when the ASIC itself is 
>>limited to a gigabit.  Don't want to make the same mistakes again :-)
>>
>>The WS-X6748 for example shows:
>>
>> > Module in slot 2 has 3 type(s) of ASICs
>> >         ASIC Name      Count      Version
>> >             JANUS          2      (1.0)
>> >               SSA          2      (9.0)
>> >            ROHINI          4      (1.5)
>>
>>(The 6724 shows 1/1/2 for same ASICs)
>>
>>I'm guessing the 'ROHINI 4' is mapping these ports 
>>similarly?  (1-12, 13-24, 25-36, 37-48?)
>>
>>What's the oversubscription rate?  (Praying it's not 12-to-1...)
>>
>>This is on a 6509E chassis, Sup720s.
>>
>>Jeff
>>
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>
>
>
>Tim Stevenson, tstevens at cisco.com
>Routing & Switching CCIE #5561
>Technical Marketing Engineer, Catalyst 6500
>Cisco Systems, http://www.cisco.com
>IP Phone: 408-526-6759
>********************************************************
>The contents of this message may be *Cisco Confidential*
>and are intended for the specified recipients only.



Tim Stevenson, tstevens at cisco.com
Routing & Switching CCIE #5561
Technical Marketing Engineer, Catalyst 6500
Cisco Systems, http://www.cisco.com
IP Phone: 408-526-6759
********************************************************
The contents of this message may be *Cisco Confidential*
and are intended for the specified recipients only.