[c-nsp] Nexus 9300 sflow performance

[Satish Patel]

We have cisco Nexus9000 C9396PX

60 Gbs is data traffic, and 24Mpps ( packet per second ) not sure how
to convert it into flows. Could you please share your sflow
configuration if you don't mind?

I had nfsen in past with 8CPU / 4GB memory but it was damn slow :(
but it could be me.. i will set up again and see if it worth it or
not.

On Wed, Mar 20, 2019 at 11:34 AM Nick Cutting <ncutting at edgetg.com> wrote:
>
> Good point.  We waited for the second Gen
>
> Regarding 60 Gbs, isn’t that is the data traffic, not the flows or sampled flows levels?
>
> Our NFSEn box is centos
>
> 4 vCPU and 4 GBrams
>
> Collecting flows from maybe only 30 devices, about 20Gbs and 3k flows per sec.
>
> -----Original Message-----
> From: Tim Stevenson (tstevens) <tstevens at cisco.com>
> Sent: Wednesday, March 20, 2019 11:20 AM
> To: Nick Cutting <ncutting at edgetg.com>; Satish Patel <satish.txt at gmail.com>; cisco-nsp at puck.nether.net
> Subject: RE: [c-nsp] Nexus 9300 sflow performance
>
> This message originated from outside your organization.
>
> Make sure you distinguish between N9300 (1st generation) and N9300-EX/FX/FX2 (2nd generation). The SFLOW + SPAN limitation applies only to the latter. It's also on the latter that Netflow is supported, which can run concurrently with SPAN sessions.
>
> Tim
>
> -----Original Message-----
> From: cisco-nsp <cisco-nsp-bounces at puck.nether.net> On Behalf Of Nick Cutting
> Sent: Wednesday, March 20, 2019 6:19 AM
> To: Satish Patel <satish.txt at gmail.com>; cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] Nexus 9300 sflow performance
>
> We use sflow on 9300's, no performance hit - but you cannot use span sessions at the same time.
>
> Newer code revisions support netflow, without the SPAN session limitation, although we have not tried netflow on the 9300 yet.
>
> For a collector We use NFSEN - opensource, and quite a big install base, and it seems to handle a lot of flows.
>
> It supports sflow and netflow as we have a mix, just make sure you add the sflow option at build time as it’s a bit funky old linux to add it after.
>
>
>
> -----Original Message-----
> From: cisco-nsp <cisco-nsp-bounces at puck.nether.net> On Behalf Of Satish Patel
> Sent: Wednesday, March 20, 2019 8:21 AM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] Nexus 9300 sflow performance
>
> This message originates from outside of your organisation.
>
> Folks,
>
> I have L3 Nexus 9300 switch which is running 60Gbps traffic on ISP interface so I’m planning to run sflow on that specific interference to get flow.
>
> Does it going to create any performances issue on switch?
>
> Can I run sflow on Layer 3 LACP interface?
>
> Can anyone suggest free open source sflow collector?
>
> Sent from my iPhone
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