What does SNMP do?

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SNMP
I have heard from lots of people that SNMP is only used to check the connectivity it does not calculate the bandwidth. I want to know, is that right?
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The protocol itself does not calculate anything.  It basically just carries information between monitored systems (agents) and a monitor (the manager). It can read data from the devices, and also potentially modify some data too, and the communication can be started by either end.

If a monitored system calculates bandwidth usage or any other similar information and it exposes it, then the manager can receive that information and react accordingly.

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  • Meghabhardwaj
    Like netflow, we use to check the bandwidth usage. I have checked on google there was a point "calculation of bandwidth utilization using snmp". If we are using netflow, then what is the role of snmp in that.
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  • carlosdl
    Netflow is a device feature.  You can only use netflow to monitor bandwith usage if the device/interface is netflow-enabled.

    Those networking devices that support netflow can expose the data they collect/calculate through an SNMP MIB, which is some kind of database that exposes information about a monitored device. In that case netflow collects/calculate and exposes the data, and SNMP is used to access the exposed data from a monitoring system.
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  • Meghabhardwaj
    Thanku
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