We are experiencing slow response copying a single 2mb file from a virtual machine to a physical server. On the other hand, we get normal response copying the same file from the physical server to a virtual machine.
vmnic1, the network adapter being used by our Virtual machine is set to AUTO Negotiate but speed is 100 mb Half Duplex only while the other vmnic, vmnic0, being used by Service Console is also set to AUTO Negotiate and speed is 1000 mb Full Duplex.
I tried to set vmnic1’s speed to 1000 mb Full Duplex but the speed instead turns to DOWN so I set it back to AUTO Negotiate.
Hoping for your immediate response on this.
you probably may have to check duplex settings of vmnic1 switch port on the switch side,if its auto try setting 1000 full duplex both on switch / host side..
Other than switch port settings, ensure that the IRQ for the pNIC is not shared with something else. Some older HP DL585s for example had the ILO and first pNIC port sharing an IRQ which would bring the speed of the first pNIC down to 100MB and sometimes half duplex. I would verify that the hardware you are using does not have this type of issue as well.
Edward L. Haletky
VMware Communities User Moderator
Author of the book 'VMWare ESX Server in the Enterprise: Planning and Securing Virtualization Servers', Copyright 2008 Pearson Education. As well as the Virtualization Wiki at http://www.astroarch.com/wiki/index.php/Virtualization
Have you looked at the ports on the pswtch, are there any error counts incremening if there are what counters
fast retrasnmits can be duplex issues.
Who is the pswitch vendor, have you tried a different port on the pwsitch..
I think there's no issue on the physical switch since on the other pnic which the service console is connected it transmits 1000 full duplex but on the other pnic where the virtual machines is connected it just transmits 100 mb half duplex.. Is there any other workaround on this matter.
Thanks for your response..
Actually, our main concern here is that when I transfer 2MB file physical to virtual the transferring of file is ok, but when I transfer from virtual to physical the transferring of file is very slow..
Hoping for your immediate response.