Cisco PPS standard

Answered Question
Oct 29th, 2007

Can anybody tell me how Cisco calculates the maximum throughput of a router? In DataSheets the unit used is kpps. Can anybody tell me what is the size of the packet that cisco uses to calculate the maximum throughput of Router

Correct Answer by Paolo Bevilacqua about 9 years 4 months ago

See attached document. Note the throughput numbers are taken with largest packet size as mentioned above.



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Paolo Bevilacqua Mon, 10/29/2007 - 05:06

For maximum throughput in mbps, the largest possible packet size is used, For maximum switching performances, the smaller packet size is used. Sometime, test are also doen with a mix of size or an average size.


lgijssel Mon, 10/29/2007 - 05:08

If not stated otherwise, these tests are always performed with minimum-size packets i.e. 64 bytes.

This must be considered to be the most cpu-intensive size because this contains the maximum number of ip headers and CRC's to check per kilobyte.

Another consideration is that more packets can be squeezed in the available interface-bandwidth when they are smaller.


regards,

Leo

noman_qureshi Mon, 10/29/2007 - 05:17

Thanks for prompt replies, actually I need to know what is the maximum bandwidth throughput of my cisco 2611 Router. I have heard that 2611 supports maximum of 7.5 Mbps. Is this true? My router's response time increases on bandwidths above 3Mbps. However, the CPU load and memory load never exceeds 50% on even on 3.5Mbps Bandwidth.

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