we just installed a new 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
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
You can try a nic teaming where you have one port active and the other standby. Then you have a failover scenario. You can use two indipendent ports at the switch. If you are using nic teaming with both ports active you need some configurations at the switch. For Cisco you need an etherchannel and on the serverside LACP. Be aware: Cisco LACP is not Windows LACP.
It's already active/passive and spread over 2 Switches. So it makes not much sense that it's working full speed without Team - and slow in Team where only 1 (the same as standalone) NIC is active ... :-/
If NIC device drivers permit (and, generally, on such Server class hardware will and software too) why not simply go with LACP (IEEE 802.3ad) on both ends (Server and Switch)? maybe you can't deploy a LACP vNIC on VMWare vSphere side since to deploy LACP you must have deployed vDS (Distributed Switch) and not simply just vSS (Standard Switch). Is this the case?
