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# (How-to) Network Usage Calculation over set time frame?

Posted on 2016-09-17
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I'm looking for a simple equation.   (I feel dumb for not knowing this)
How do I find the max (throughput?) of a set bandwidth over a set period of time?

For example:
- How much data can be transferred over (x mbps) for a duration of 24hrs?  (theoretical is fine)
- How much data can be transferred over (x Mbps) for a duration of 24hrs?  (theoretical if fine)

The reason I ask is... I'm trying to decipher this bandwidth usage report.  If the WAN link is capped at 650mbps...
- What percent (of link capacity) is being used on a daily basis?
- Any other conclusions to draw?
network_Month.png
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Question by:irishmic33
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Accepted Solution

Predrag earned 2000 total points
ID: 41803494
650Mbps = 650/8 = 81.25MB per second
81.25MB * 60sec = 4875 MB per minute
4875MB * 60 minute = 292.5 GB per hour
292.5 GB * 24h = 7020 GB per day / 7.02TB per day

Not sure what graphic represent, it could be either cumulative, or GB transferred per traffic type.
If it is cumulative traffic it is easy.

Per day Aug 23
240 / 7020 = 0.034 = 3.4%

Aug 23 estimation (if it is per traffic type):
other 26GB + apple-updates 27GB + paloalto-updates 27GB + itunes-base 30GB + etc....
26 + 27 + 27 + 30 + 30 + 40 + 74 + 85 + 118 + 185 + 235 = 877
877 / 7020 = 0.1249 = 12.49%

Typically you should know traffic during working (most likely it would be more relevant than per day basis - for 10 working hours it would be around 30% average utilization) and peak hours (Is link congested during some hours?).
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LVL 2

Author Closing Comment

ID: 41803600
This is exactly what I was after.  Just didn't trust my own calculations.  You sir are a gentleman and a scholar.  Thank you.
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LVL 31

Expert Comment

ID: 41803645
You're welcome.
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