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Does my Cisco device (Router/Switch) support NetFlow Export?

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It can become quite complicated to determine which Cisco devices support Netflow Export and in what version. PRTG Traffic Grapher currently only supports NetFlow V5.

Hardware Based Switches

Hardware based switches like the 4000/4500 and 6000/6500 series perform the processing of data packets inside their hardware ASICs and can only export NetFlow if this feature is built into their hardware, which is the case only for the top-notch supervisor cards and may even require the additional netflow card.

Here are a few particular characteristics:

Catalyst 4k:

  • Supervisor I, II, II Plus and III do not support Netflow at all
  • Supervisor IV supports NetFlow Export with the optional Netflow Daughter Card (IOS 12.1.(19)EW, V1, V5 and V8)
  • Supervisor V supports NetFlow Export with the optional Netflow Daughter Card (IOS 12.2(25)SG, V1, V5 and V8)
  • Supervisor V-10GE has built-in NetFlow support (IOS 12.2(25)EW, V5 and V8)

Catalyst 6k:

The configuration can be quite complicated for these models, depending on the code you are running on the Cat6k. Available options are CATOS, hybrid, and native mode, all with different features and capabilities. There are also different versions of Netflow Export if the export is coming from the SP or from the RP (slow path/fast path).

Model 12000:

  • NetFlow V5 is supported by IOS 12.0(14)S
  • NetFlow V8 is supported by IOS 12.0(6)S
  • NetFlow V9 is supported by IOS 12.3(1),12.0(24)S,12.2(18)S, 12.3(2)T

Other Devices and Software Based Routers:

Basically all _software based_ Cisco devices with Cisco IOS software (most smaller routers) may be able to support Netflow Export V5 with IOS Version 11.1CA or later. Important: Not everything which is configurable under the IOS is supported and tested by Cisco!

The devices Cisco 800, 1700, 2600, 3600,3700,6400,7200,7300,7500 support NetFlow V9 with IOS Versions 12.3(1),12.0(24)S,12.2(18)S, 12.3(2)T. Have a close look at the release notes for details.

Also, remember that when the Netflow Export is processed by the software you should expect some CPU load impact and you should carefully watch the CPU load of your device!

By Category

PRTG Traffic Grapher V6

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