Can I exclude traffic from netflow generation

[Difan_Zhao]

Hi experts,

I have a few CAT 9500 used as the distribution switches and I am generating Netflow data on them. However, as far as I can tell, the buffer is fully filled and flow data is lost. Here is what I see with `show platform softwar fed switch active fnf sw-table-sizes all-asic`. For asic1-3, I see MaxEntries=32768 MaxOverflow=256, and usedBankEntry 32768 usedOvfTcamEntry 256. For asic0, Max entries and usage are all 0. Maybe it is not for Netflow traffic.

Anyway, I know that close to half of the flows are DNS and I want to exclude them to free some resources for netflow for other traffic. Is it possible on this platform?

I also welcome other suggestions (such as allocating more resources to buffer) to increase the Netflow capacity.

Thanks!

[balaji.bandi]

I also welcome other suggestions (such as allocating more resources to buffer) to increase the Netflow capacity.

check below guide what max support :

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9500/software/release/17-12/configuration_guide/nmgmt/b_1712_nmgmt_9500_cg/configuring_flexible_netflow.html

also check some best testing :

https://www.cisco.com/c/en/us/support/docs/switches/catalyst-9300-series-switches/218311-configure-and-verify-netflow-avc-and-e.html