Calculate the bandwidth utilization from the RMON data

Latest reply: Jul 17, 2019 14:59:38 729 17 18 5

RMON data is a performance platforms to monitor a packet transmit and receive. It captures a number of packet in a type of frame size, a total packet, bad packet, oversize packet, FCS (aka CRC), Jitter, broadcast, unicast, and so on. Some RMON data not showing a bandwidth utilization. Well, we can can calculate the bandwidth utilization through the number of packet provided.


To calculate the bandwidth, get the number of packet in aGood Octet Receive (byte)andGood Octet Transmitted (byte). Some RMON shows aReceived BytesandTransmitted Bytesinstead. And then, get the value of the capturesampling period(in a value of second). If there is no capture sampling period provided, we can consider the capture sampling period is per second (1 second).

Below is the example:

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Here is the formula:

103533b818calcgdpekcl4.png?Capture1.PNG

  • Good Octet Receive = we take from the value of packet in the Good Octet Received / Receive Bytes
  • Good Octet Transmit = we take from the value of packet in the Good Octet Transmitted / Transmiited Bytes.

  • Sampling Period = we take from the value of sampling period. If there is no sampling period provided, we can consider it as 1 second sampling period.

  • Configured bandwidth = we take from the port bandwidth (10Gbps, 1Gbps, 100Mbps, 10Mbps)

  • x
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Albertpr Created Jun 12, 2019 10:56:42 Helpful(0) Helpful(0)

Great sharing. Learnt how to calculate the bandwidth.
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anildip Created Jun 12, 2019 10:57:17 Helpful(0) Helpful(0)

If we take a longer sampling period lets say 60 seconds, will there is difference in the value?
  • x
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inam Created Jun 12, 2019 10:58:15 Helpful(0) Helpful(0)

This is very helpful! Thank you for sharing the knowledge
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CZQCHAI Created Jun 12, 2019 10:58:22 Helpful(0) Helpful(0)

One more thing to take notes, about the 'Display Accumulated Value'. Sometimes customer/user want to know the traffic flow in each second, in this condition, need to uncheck the checkbox to show the traffic in seconds.
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Jali Created Jun 12, 2019 10:59:57 Helpful(0) Helpful(0)

Sampling period can be set to longer time?
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yjhd Created Jun 12, 2019 11:05:22 Helpful(0) Helpful(0)

very good, thanks for your sharing
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asrul Created Jun 12, 2019 11:09:01 Helpful(0) Helpful(0)

Posted by CZQCHAI at 2019-06-12 10:58 One more thing to take notes, about the 'Display Accumulated Value'. Sometimes customer/user want to ...
Yes. Good point! we need to uncheck the box
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Arban Created Jun 12, 2019 11:39:09 Helpful(0) Helpful(0)

very good sharing
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asrul Created Jun 12, 2019 11:41:09 Helpful(0) Helpful(0)

Posted by anildip at 2019-06-12 10:57 If we take a longer sampling period lets say 60 seconds, will there is difference in the value?
Yes indeed. But it will be no huge differ. The standard capture is per 5 seconds.
  • x
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