Hi
so i got to test some more.
Tested 10.14, 10.13, 10.12, 10.11, 10.10.
10.11 and 10.10 actually work, but not 12 or later.
10.11
switch# sho version
-----------------------------------------------------------------------------
ArubaOS-CX
(c) Copyright Hewlett Packard Enterprise Development LP
-----------------------------------------------------------------------------
Version : Virtual.10.11.0001
Build Date :
Build ID : ArubaOS-CX:Virtual.10.11.0001:ceaf8b745b6a:202211301746
Build SHA : ceaf8b745b6a277969971642cb0aa4c6c3d8925f
Hot Patches :
Active Image :
Service OS Version :
BIOS Version :
switch# sho sflow
sFlow Global Configuration
-----------------------------------------
sFlow enabled
Collector IP/Port/Vrf 192.168.2.79/16896/default
Agent Address 192.168.2.146
Sampling Rate 1
Polling Interval 10
Header Size 128
Max Datagram Size 1400
sFlow Status
-----------------------------------------
Running - Yes
Collector Status
----------------
sFlow enabled on Interfaces:
-----------------------------------------
1/1/1
sFlow Statistics
-----------------------------------------
Number of Samples 46915
switch# sh sflow int 1/1/1
sFlow Configuration - Interface 1/1/1
-----------------------------------------
sFlow enabled
Sampling Rate 1
Number of Samples 47983
sFlow Sampling Status success
pretty much the same for 10.10.
So not sure if something changed in the simulator. I also noticed there seems to be no way in any of these versions to configure ingress / egress for sflow.
Original Message:
Sent: 11/21/2025 8:38:00 AM
From: muhittin
Subject: RE: SFlow working?
Hello @nicholaszn
I think it seems like a simulator issue. Have you had a chance to test this on a physical CX device? Did the same issue occur there?
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Original Message:
Sent: Nov 20, 2025 03:10 PM
From: nicholaszn
Subject: SFlow working?
Tested 10.14 and 10.13. same issue. Starting to think its a simulator limitation.
Original Message:
Sent: Nov 17, 2025 06:13 PM
From: nicholaszn
Subject: SFlow working?
Ill try to test 10.14.
Original Message:
Sent: Nov 17, 2025 03:05 PM
From: muhittin
Subject: SFlow working?
I checked your latest output.
There is clearly traffic on interface 1/1/2 (millions of RX packets and hundreds of thousands of TX packets).
sFlow is enabled globally and on the interface, with a sampling rate of 1 and a polling interval of 10 seconds.
However, the show sflow and show sflow interface 1/1/2 commands still show Sample Count: 0, and in Wireshark, the sFlow datagrams only contain Counter samples, with no Flow samples at all.
This appears to be a limitation or bug in the 10.15/10.16 simulator images rather than a configuration issue. sFlow flow sampling works as documented on physical CX switches, and there is even an official "AOS-CX Simulator sFlow Lab" based on older images where flow samples are visible.
https://higherlogicdownload.s3.amazonaws.com/HPE/eb4753c1-3d17-4d1f-9564-eacaa5a91eae_file.pdf?X-Amz-Expires=3600& X-Amz-Security-Token=IQoJb3JpZ2luX2VjEOz%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaCXVzLWVhc3QtMSJHMEUCIQCIME81%2FY3h8Dlup6EF1SwT% 2B51NsCZK1ndBfDwCX9gSAQIgTEwpjQNKHAmRA8WZx5vIisCpqgIkJjhkBZSCnKGjPg4qugUItP%2F%2F%2F%2F%2F%2F%2F%2F%2F% 2FARAAGgwzODAzMzczNDA3MDYiDCnd%2BD8%2BsG1XDd2TuSqOBdQZPtj5JhOFUJV5jbIPmTHkSsqXojere7wZMR1B% 2Bqqvox36okd2DUIf5NVniOpyyKQMhWpx5Xo1wo80Tr3X2syrUEcvPfizsA%2FsSnoxh%2F3% 2BBDLKlEOa%2Fe%2ByVaJC4klrytLxGDjWnxxlUat%2FTU9nU4JYtt0p3RljQPtLtK3tVfE%2FN8Qzy% 2BhUQMLGnf3folgMghkVMRIJEgyIR5RtkWQ5Pu3Pk3Govv0P10akAfMhS7rMtrTfuD29mG6ApTRk7ZP%2F5Kqs4oO%2Btbbwo5xdd9iBFoDKcYA7GitVhoIww% 2FKkKJrX6QtN2CGLKHWOwj1zLRI4c%2F0aPLXdDm0QGNsGWyizyHSY0BV215SlQDAYk5IwQaNmvaVX0G0aKMHw5JEgQ%2FXv52vxnvzbuqT7%2BS% 2Bf65GphC9EBggQB%2BerR4WiF%2B9I%2FNZWu9qkX6I8VDelkIVPCTSCRkZ7DdKb8hC%2BVa3iiJK0zNQZHSkbM0Eg4mffD7d7LWM5kFIXYalq7pi8smfGVlmwER% 2BmYN4tcNPdcTM5ZTsKzN1Yq48JkiK6JDWZhL7VIqJyItEm%2BIe%2FnjkwlScgN2lbHUpA23Q5OUG4ihO5OXwtpUucbeEm2jMnJ2lAttutxm6yiNAYan2wrolWwa% 2F1rIXgVkzA9g3R0rejR93GZ2rvo%2BVCvevSnjn2QBdLrOsGgDnr6IMPP4YHAxQ3wz8UanRZBnh%2FLUTpdhmdx%2BsIyN9wdN%2Fzj% 2FIB4pRh8Oon2jBBZNiPb%2BWPz03oN1wVvTH9bRqzqIZDlUQMU6ztZnDD% 2FR3omwx71JyQdn2VJuXTMt0AqvS4oT8B5NlXoX8R3WXFBOJ8tNMO56klAXcx00btrJcWYtBuvKyYz34M% 2BjewNW2EHDD76O3IBjqxARvGmoccbPIAw%2BOtY%2F4fKIXlGeAh% 2BVfz0y%2BRSn7rppNGxDlHTHmzODadCfJFvurgvEtsuW164qBfSpBwL34sTpMXKNnhM48% 2B3JC5eyrXpUSyeopbUjxCHbqJ0KoqF86IfzVNdzic9jzyQhUQpHulvTri06qbgNfO2cmCbZBuPTzwu%2Beq3dGthRWsYL9%2B8jg0u% 2BUYBIGihmrPons0GxoSSY0VVcCnb19HWcfhNSIMygIYrw%3D%3D& X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAVRDO7IERBKTFNR7U%2F20251117%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20251117T194636Z& X-Amz-SignedHeaders=host&X-Amz-Signature=e182535ea9e566ea0ed00343556436adb9643fe7bd28c0299eda4a1bec9aea50
At this point, my recommendation would be:
If possible, test with an older simulator image (the one used in the sFlow lab) or
Test the same configuration on physical CX hardware.
If you can reproduce this behavior there as well, it would be beneficial to open a TAC case so the engineering team can verify whether this is a known simulator issue in the 10.15/10.16 versions.
Original Message:
Sent: Nov 17, 2025 11:59 AM
From: nicholaszn
Subject: SFlow working?
There is no counters
switch# show interface 1/1/2 counters
Invalid input: counters
switch# show interface 1/1/2
brief Show information in brief format
dom Show transceiver diagnostics information
environment Show interface environmental information
error-statistics Show interface error statistics
extended Show additional interface statistics
flow-control Show flow control information
human-readable Show statistic in human readable format
link-status Show link status information
monitor Continuously monitor interface statistics
physical Show physical interface information
qos Show QoS info for the interface
queues Show transmit queue information for the interface
statistics Show interface statistics
transceiver Show transceiver information
utilization Show utilization statistics
vsx-peer Displays VSX peer switch information
<cr>
switch# show interface 1/1/2 statistics
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Interface RX Bytes RX Packets RX Drops TX Bytes TX Packets TX Drops RX Broadcast RX Multicast TX Broadcast TX Multicast RX Pause TX Pause
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1/1/2 216183614 3004269 0 48385902 584886 0 0 0 0 0 0 0
switch#
Yea i tried to check sflow mode both, but 10.16 and 10.15 didnt have it???
switch(config)# sflow mode both
Invalid input: mode
switch(config)# sflow
agent-ip Set agent IP address (Suggested: Reachable from
collector)
collector Set collector IP address configuration
disable Disable sFlow
header-size Configure sFlow header size
max-datagram-size Configure sFlow maximum datagram size
polling Configure polling interval
reachability-check Enable collector reachability check using ICMP
sampling Set sampling rate
<cr>
switch(config)# sflow
Original Message:
Sent: Nov 17, 2025 06:31 AM
From: muhittin
Subject: SFlow working?
The global and interface config look correct.
Sampling rate 1
Previously, only "Counters sample" was visible in Wireshark; this indicates that the flow engine is not working, only per-interface counters are being sent.
Traffic may not actually be passing through 1/1/2.
Since sampling is set to 1, even a single ping to 1/1/2 should increase the sample count. So, could you run the following command and check if there is any change in the values?
show interface 1/1/2 counters
We need to check if the RX/TX packet counts are increasing. If the interface counters are also close to 0, then no traffic is passing through that port.
Also, this command might be useful:
Sampling direction (mode)
Versions 10.14+ have the global sflow mode ingress, egress, both command; ingress is the default. If 1/1/2 only sees heavy traffic in the egress direction, the sample count in ingress mode may remain 0.
config terminal
sflow mode both
You can type this command and test again.
Original Message:
Sent: Nov 16, 2025 09:20 PM
From: nicholaszn
Subject: SFlow working?
output:
switch# show sflow
sFlow Global Configuration
-----------------------------------------
sFlow enabled
Collector IP/Port/Vrf 192.168.2.79/16896/default
Agent Address 192.168.2.147
Sampling Rate 1
Polling Interval 10
Header Size 128
Max Datagram Size 1400
reachability-check disabled
sFlow Status
-----------------------------------------
Running - Yes
Collector Status
----------------
sFlow enabled on Interfaces:
-----------------------------------------
1/1/2
sFlow Statistics
-----------------------------------------
Number of Samples 0
switch# sflow status
Invalid input: sflow
switch# sh sflow int 1/1/2
sFlow Configuration - Interface 1/1/2
-----------------------------------------
sFlow enabled
Sampling Rate 1
Number of Samples 0
sFlow Sampling Status success
I dont see any errors here, just no samples.
------------------------------
Output:
```
Original Message:
Sent: Nov 15, 2025 12:13 PM
From: muhittin
Subject: SFlow working?
Hello,
Can you share your global sflow configuration and the configuration under the port you are listening to?
I think you left the sampling and polling value at the default "4096*-30," and since a packet of that size is not passing through that port, it is not generating data.
show sflow
sFlow Status
sFlow Statistics
show sflow interface x/x/x
Original Message:
Sent: Nov 13, 2025 09:52 AM
From: nicholaszn
Subject: SFlow working?
Has anyone got SFLOW working?
I tried with v 10.16 and 10.15 in both esxi and gns3.
In wiregaurd the switch just sends counters sample data not flow data.
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