GLOBAL NET PACKET RATE

[Fabrizio Maggioni_2]

Hi,

I would like to know which formula i need to apply to convert the value of global net packet rate in percentual value.

Thanks.
Fabrizio

[Enrico P.]

Hi,
I think not have many sense to convert this value, or better it is more complicate (for me).

GLOBAL NET PACKET RATE: The number of successful packets per second (both inbound and
outbound) for all network interfaces during the interval.
Successful packets are those that have been processed without
errors or collisions.

You should known all packages dimension for all protocols that cross all your network interfaces per second and based at speed of your network you could establish the percentage ...


Enrico

[Fabrizio Maggioni_2]

Thanks.

In case, we suppose the package dimension is 1500 and my network speed is 100,can you suggest me tha formula to convert it into percentual value?

Regards,
Fabrizio

[Enrico P.]

Hi,
suppose you have one single network card:

number_of_packages*1500(byte)/8=number_of_bit/sec

This should be the percentual value

Enrico

[Enrico P. · Accepted solution]

Sorry,

number_of_packages*1500(byte)*8=number_of_bit_sec

number_of_bit_sec/1000000=%

This should be the percentual value

Enrico

[Fabrizio Maggioni_2]

Thanks.

Fabrizio

[rick jones]

Ass-u-me-ing a packet size of 1500 bytes is just plain wrong and will undoubtedly yield calculated percentages that are higher than reality. If you want to be overly conservative I suppose you could go that way.

If you really must use an approximation of the NIC (NIC, not network) utilization you could take lanadmin statistics over a representative interval and use them to calculate your average packet size.

IIRC contemporary versions of Glance/MeasureWare (whatever we call it these days) can track the average queue depth of an interface's transmit queue. That is probably a better indicator of at least outbound NIC utilization.

And "NIC" can bottleneck for reasons beyond bitrate. There are packet per second limitations of some NICs. There is also the possiblity of the NIC's interrupt CPU being saturated and so even if the bitrate isn't at 50% one cannot get more through the NIC.