Hello!
- 3 hosts esxi 6.5.0, 5969303
- Network 2NIC 10G active on each server
- VCSA 6.5.0.10000 Build Number 5973321
- vSAN 6.6
We have a very strange situation.
On esxi1 is the file server (Windows 2012R2), on esxi2 or esxi3 - the client virtual machine (Windows 7). All machines are in the same segment of the network and on the same storage (vSAN).
Problem: when copying a file from a file server to a client machine located on another host, the copy speed is very small - up to 50 megabytes/sec (ie ~ 400 megabits/sec). If the client machine and the file server are on the same esxi, then the copying speed is 300 megabytes/sec (ie ~ 2400 Mbit/s).
Is this speed of copying between machines located on different esxi - abnormal? After all, each server has two active links 10G! What could be the problem?
* I'm not sure if this is important, but we use JumboFrames and Private VLANs.
Any help?
Your host could be auto negotiating the speed with up stream switches.please check the switch port configuration like speed, duplex settings end to end
I checked - everything is fine here. But I found the reason: "Beacon Probing" was specified in the settings of the "Teaming an Failover -> Networ failure detection" port-group. I installed "Link status only" and the copy speed became high.
However, when copying a file, this speed is high only at the beginning of copying, in the process it steadily decreases (from 300 megabytes / sec to 30).