question about pps(packet per second)

[Ray Han]

Hi all

I have a question about pps.

see the below.

=====FE#1=========(Router)======FE#2===

Router has two fast-ethernet, FE#1 and FE#2

and has sup720-3bxl engine.

sup720-3bxl supports up to 400Mpps with DFCs.

I wonder what's the pps exactly?

if one packet is incomming Router from FE#1 and out to FE#2

in this case, is it 2 pps? or 1 pps?

is PPS a sum of incomming packet count and outgoing packet count? => 1+1=2pps

or a counter through the router(in and out packet==1)?

[cadet alain · Accepted solution]

Hi,

pps is just a counter divided by timeslot  like bps and it is per interface and per direction.

Regards.

Alain.

[Joseph W. Doherty · Accepted solution]

Disclaimer

The   Author of this posting offers the information contained within this   posting without consideration and with the reader's understanding that   there's no implied or expressed suitability or fitness for any purpose.   Information provided is for informational purposes only and should not   be construed as rendering professional advice of any kind. Usage of  this  posting's information is solely at reader's own risk.

Liability Disclaimer

In   no event shall Author be liable for any damages whatsoever (including,   without limitation, damages for loss of use, data or profit) arising  out  of the use or inability to use the posting's information even if  Author  has been advised of the possibility of such damage.

Posting

PPS measures what it stands for, i.e. how many packets are forwarded per second.

Unlike bits per seconds, since packets vary in size throughput varies at the same PPS rating.

For example, for 10 Mbps Ethernet minimum size frames (64 bytes) require 14,880 pps but maximum size frames (1518 bytes) require 812 pps.

The foregoing is for traffic in one direction, for duplex the PPS would need to be doubled.

[Ray Han]

Thanks Joseph

it's a good help to understand about this.

and hope to have a good day v