How probing network graph happens?

Answered Question
Aug 4th, 2008

Hi Experts,

I am trying to figure out how the probing for network graph happens, example if there is this COncord Server that polling data, which service ports is being used? is it snmp port?

As curious to know how they probe and draw the network graph.

Thanks in advanced.

I have this problem too.
0 votes
Correct Answer by rajivrajan1 about 8 years 5 months ago

dear cindylee27 ,

Yes you were correct.Probing will happen for SNMP.Im not very sure about concord, but it should also happen in the same way.

Any other software , Mrtg,Cacti,Whatsup, all are using SNMP and they will be sampling the data flow rate on predefined intervals( for example MRTG will do the same for every 5 mins by default).

For polling the input and output values it will be using respective OIDs.Then there are calculateions and tools to fiureout the graph.

This is realy intresting topic if u get into it.All the best.

HTH

Rajeev.S

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Correct Answer
rajivrajan1 Mon, 08/04/2008 - 21:29

dear cindylee27 ,

Yes you were correct.Probing will happen for SNMP.Im not very sure about concord, but it should also happen in the same way.

Any other software , Mrtg,Cacti,Whatsup, all are using SNMP and they will be sampling the data flow rate on predefined intervals( for example MRTG will do the same for every 5 mins by default).

For polling the input and output values it will be using respective OIDs.Then there are calculateions and tools to fiureout the graph.

This is realy intresting topic if u get into it.All the best.

HTH

Rajeev.S

Along with that, there are certain tools that are just real time graphers, like simple MRTG, and there are some tools that work on RRD (Round Robin Database i guess). The difference between both is the clear, that is the RRD tools have the capability of sample/aggregate the data/graphs based on customizeable user's requirement (RRD MRTG, Orion from Solarwinds etc), whereas the non-rrd tools work on predefined sampling of the collected data.

HTH

Mohsin

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