[c-nsp] Linecard performance w/ SUP32's

[Tim Stevenson]

Hi Graham, please see inline below:

At 09:17 AM 8/9/2010, Graham P. Wooden averred:

>Hi there,
>
>I am trying to decide if swapping a few x6348s to x6548 
>(fabric-enabled/CEF256 .. no DFC) will be a huge performance gain 
>with SUP32s (IOS is SXI).

Nope.

> >From what I am reading, it looks like they will somewhat - but 
> appears that I will bump up against the 256 mark until the SUPs 
> themselves get upgraded.

There is no "256" with sup32. It is a bus-based sup, no xbar fabric 
whatsoever.

>Even if the line cards have the DFCs, can the SUP32-3B take advantage of them?

DFC + sup32 = not supported/possible.

Basically you're trading one bus-attached 48 port 1G card for 
another. There are some benefits perhaps - qos capabilities, 
possibility to u/g to sup720 in future & get fabric connections & add 
DFCs for more performance - but for now, they are pretty equivalent.

Hope that helps,
Tim

>Currently, this chassis doesn't see a whole-lot of traffic and is 
>very light on the QoS side - but I have the funds to get this 
>particular chassis upgraded and thought that spending a few bucks 
>for new line cards would be a step in the right direction.
>
>Appreciate any real-world comments on the older 6348 vs. 6548 w/ a SUP32.
>
>Thanks,
>
>-graham
>
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Tim Stevenson, tstevens at cisco.com
Routing & Switching CCIE #5561
Distinguished Technical Marketing Engineer, Cisco Nexus 7000
Cisco - http://www.cisco.com
IP Phone: 408-526-6759
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