[c-nsp] Nexus 9300 sflow performance

[Nick Cutting]

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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