10GBe + Network Teaming = Problem?

[Patrick N. _]

Hey there,

we just installed a new HPE DL380G9 (H5) in our Rack and noticed slow 10GBe Network Performance while migrating VMs to the new Server. Also Ping-Times went high on new Server - resulting in slowdown of all already migrated Machines (Network wise).

Firmware/Drivers are all up2date (SPP 06.2018), on all Servers there is a NIC TEAM - 10GBe NIC = active, 1GBe NIC = Standby in case of 10GBe Network Troubles.

Now I did some Performance Tests with NTttcp - results:
H3 = Windows 2012R2
H4 = Windows 2012R2
H5 = Windows 2016
Z240 = Windows 10

H3 (DL380G8) --> H5 (DL380G9) --> 229MB/s
H4 (DL380G9) --> H5 (DL380G9) --> 287MB/s
H3 (DL380G8) --> H4 (DL380G9) --> 399MB/s

H3 (DL380G8) --> Z240 Workstation --> 730MB/s
H4 (DL380G9) --> Z240 Workstation --> 620MB/s
H5 (DL380G9) --> Z240 Workstation --> 773MB/s

Z240 Workstation --> H5 (DL380G9) --> 299MB/s
Z240 Workstation --> H4 (DL380G9) --> 422MB/s
Z240 Workstation --> H3 (DL380G8) --> 226MB/s

Look pretty weird to me - why would Speed be more than double so high to a workstation than to the other Servers? Servers + Workstation are on the same 10GBe Switch.
It seems like only receive is slow on all Servers?

Not quite sure how to further Debug this issue and hoping someone here can give me a Hint in the right Direction?

thx, bye from rainy Austria
Andreas Schnederle-Wagner

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