[c-nsp] DFC3CXL CPU

[Sergey Nikitin]

Thank you all.

And once again, could anyone tell me what DFC CPU is used in the 
WS-X6708-10G-3CXL? I believe that "remote command module X show version" 
will show this information.

Thanks

Benjamin Lovell wrote:
> What he said, while adding that the CPU on the DFC is the same CPU as 
> the SP on the PFC. DFC can still see pretty significant CPU usage as 
> even if the RP or SP is doing the export the DFC CPU must still do all 
> the recored creation, aging, etc. Very fast aging timers drive up the 
> DFC CPU usage as this is the bulk of the work. Exporting is really just 
> wrapping up the DFC made records in an IP packet to correct destination.
> 
> -Ben
> 
> On Nov 15, 2010, at 12:24 PM, Łukasz Bromirski wrote:
> 
>> On 2010-11-15 16:31, Phil Mayers wrote:
>>
>>> Actually, as I understand it in certain configurations the NDE 
>>> packets can
>>> be generated and emitted by the DFC CPU. As I recall, certain netflow
>>> options and/or masks prevent this from happening, and require the RP 
>>> CPU to
>>> either modify the NDE packets which the DFC CPU generates, or 
>>> generate the
>>> packets itself.
>>> IIRC things like src/dst AS number and other things you'd expect the 
>>> RP to
>>> know, but the DFC to not, come into this category.
>>
>> Close :)
>>
>> Traditionally, a NDE is a work of active RP gathering the flows from
>> PFC TCAMs and DFC TCAMs if they're installed on the LCs and exporting
>> them to the external destination.
>>
>> Starting from 12.2(18)SXE onwards, the SP CPU (the one on the
>> Supervisor board) can export the traffic directly from non-DFC enabled
>> LCs, with the exception being a 6708-10GE (w/DFC) which can also export
>> autonomously. Other, DFC-enabled cards have to export the traffic via
>> the RP using EOBC as a transport between them and RP.
>>
>> -- 
>> "Everything will be okay in the end.  |                 Łukasz Bromirski
>> If it's not okay, it's not the end." |      http://lukasz.bromirski.net
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> 
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