Hard sFlow sampling limitations?

Created: Jan 25, 2018 13:20:44Latest reply: Dec 20, 2018 21:53:40 1740 6 0 1
  Rewarded Hi-coins: 0 (problem resolved)

Dear,


reading the documentation for the software V200R010 of the switches S6720-EI on how to configure the feature sFlow sampling (http://support.huawei.com/hedex/pages/EDOC1000135317AEG0221R/05/EDOC1000135317AEG0221R/05/resources/dc/dc_cfg_sflow_0006.html ), I find a quite limiting note considering that the device-models have 24 or 58 ports:


Hard sFlow sampling limitations?-2617477-1



This limitation of monitoring with sFlow (flow sampling) only 8 interfaces. Does it also apply to the S6720-EI model or is it a warning-notice for lower-performance equipments?


In what way can we analyze that the sampling process is not suffering degradation / overflow and the sampling has the adequate performance?


In case the limitation is valid also for the S6720-EI model, what tweak would allow flow sampling of the 24's 10G ports?. For example, of the S6720-30C-EI-24S-AC model?


I appreciate your experiences since the documentation does not justify this note.


Regards!

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Featured Answers
Created Mar 9, 2018 10:41:51 Helpful(0) Helpful(0)

Posted by chapax at 2018-03-08 14:40 Hi, What collector are you using? We have tested sfcapd, sflowtool and nProbe and none can interpre ...
Hi,

I use nfsen + nfdump. I have a lot of Huawei devices exporting sflow to this server and everything works properly. I would recommend you using this flow tool.
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WoodWood Created Jan 25, 2018 18:06:27 Helpful(0) Helpful(0)

waiting for help
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user_2844477 Created Jan 26, 2018 11:12:34 Helpful(1) Helpful(1)

Hi,

I have some of S6720-30C-EI-24S-AC in my network and I have no problems sampling sflow in all ports in inbound direction.

I haven't noticed any performance degradation so far.


Port on slot 0 Information:

Interface: XGE0/0/1
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/2
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/3
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/4
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/5
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/6
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/7
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/9
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/10
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/11
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/12
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/13
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/14
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/15
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/16
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/17
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/18
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/19
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/20
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/21
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/22
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/23
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: XGE0/0/24
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN

Interface: 40GE0/0/1
Flow-sample collector: 1 Counter-sample collector : 1
Flow-sample rate(1/x): 1024 Counter-sample interval(s): 30
Flow-sample maxheader: 128
Flow-sample direction: IN
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chapax Created Mar 8, 2018 14:43:58
What collector are you using? We have tested sfcapd, sflowtool and nProbe and none can interpret the flows exported from Huawei despite seeing them in Wireshark well parsed as Sflow V5. 
chapax Created Mar 8, 2018 14:40:57 Helpful(0) Helpful(0)

This post was last edited by chapax at 2018-03-20 12:33. Hi,
What collector are you using?

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user_2844477 Created Mar 9, 2018 10:41:51 Helpful(0) Helpful(0)

Posted by chapax at 2018-03-08 14:40 Hi, What collector are you using? We have tested sfcapd, sflowtool and nProbe and none can interpre ...
Hi,

I use nfsen + nfdump. I have a lot of Huawei devices exporting sflow to this server and everything works properly. I would recommend you using this flow tool.
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  • convention:

martin.valasek Created Dec 20, 2018 21:53:40 Helpful(0) Helpful(0)

Hello guys - just info - did you resolve your issue? As I had several S6720-EI running R010 with few patches that send-out sFlow data correctly and nfsen + nfdump was able to collect and analyze that data..However after I moved to R011 firmware the sfcapd in nfsen is not able to decrypt/read the data Huawei send - it seems there was some difference..@user_2844477 can you confirm what exact versions of firmware you run on S6720 and what versions/command line syntax you run sfcapd with?Thanks &BR
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