Hello,
I am having problems with network performance between ESX hosts and from Virtual machines to other devices on our network. This is very apparent when copying data between VMs (network speed approx 10MB/sec). I have 4 ESX hosts with approx 7 VMS on each host connected to a Fibre Channel EVA4000 SAN. Copying between drives on different disk groups on the same VM is very quick which suggests the SAN is working fine but everytime the VM has to over the network, speeds are very slow indeed.
Each ESX host has 4 NICS which are teamed but VMotion and Service Console traffic are using the same Virtual Switch as the VMs using VLANS to segregate traffic (Could this be the problem???). All the NICS are set to "autonegogiate" and are using the e1000 network driver.
Copying between VMs on the same host seems to take the longest!!
Any help would be greatly appreciated
Thanks