For these type of switches, where you're missing the flow command, verify first of all which type of " sdm template" (Switch Database Management) you are using by entering this command: In older IOS switches (like the C2960S) you will get the error " (%Unrecognized command)" when issuing the command (config)#flow?, and only the flow sampler comes up. I have tested these settings with Cisco C2960X, C3850 and C9300, in devices with the newer IOS 15.0(2a) EX5 and 03.07.04E, and the configuration works really well Important note: which Cisco switches are compatible? ![]() Ensure the channels you're monitoring are 64-bit.Configure DNS and SNMP in your Cisco switchįor the second part of this article, we will cover the PRTG configuration, as follows:.Configure the interfaces to send flow data.In the first section we'll do the following in the Cisco switches: The principle of this configuration can be organised in two blocks, the first one deals with your Cisco switches and the second one with the PRTG console. ![]() ![]() It is advisable to enable NetFlow V9 in Cisco Switches with PRTG, so you not only monitor the traffic but also the " source" and " destination" IP addresses from which the traffic is generated, giving you a better insight of what is happening in your network, and whom or what is utilising the bandwidth In this article we will explore what I did to enable NetFlow version 9 in our Cisco switches, to work in conjunction with a PRTG system. Enable NetFlow V9 in Cisco Switches with PRTG
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