Hi,
If I enable jumbo frames on a standard vSphere switch (as well as on a corresponding physical switch):
1. Do I need to change MTU settings on the VMotion interface too (since it's set to 1500 right now), or the vSphere switch settings will *overwrite* interface settings?
2. The same question is for VMs. Do I need to enable jumbo frames on all VMs that are connected to that switch?
The reason I'm asking is that we started observing occasional spikes of %DRPRX% on *some* VMs. The moment I set "Jumbo Packet" to 9000 on a VM's vmxnet3 interface, %DRPRX% drops to 0.
I also don't quite understand why only some VMs are affected? Is this an indication that affected VMs do require jumbo frames?
Say I have 10 VMs on a same host (different operating systems, but all with vmxnet3 and the default MTU 1500). All 10 are using vmnic1, but only two VMs report %DRPRX. If I adjust MTU on those two to 9000 %DRPRX disappears.
Many thanks.