Tuesday, January 14, 2020

Fix Large packet loss at the guest level on the VMXNET3 vNIC in ESXi Using Powershell

Problem:-
Most of SQL Server, today hosted on VMware, especially if that Server host very critical databases with high OLTP. When using the VMXNET3 driver on ESXi 4. x, 5. x, 6. x There is a known issue on the VMware regarding the network communications. VMware published an article on this issue. to change the Small Rx Buffer size and Rx Ring #1 Size on the NICs. you see significant packet loss during periods of very high traffic. 

also, the obvious problem if we need to apply that configuration at a very large number of servers, as usual, the answer is Powershell 😊