Increase the tx and rx buffer for vmxnet3 and e1000 virtual NIC for VMWare

To deploy a vm  doing routing between virtual NIC, you may need to increase the tx and rx buffers of the NIC to cope with burst traffic.

– To show the current tx and rx buffer of your NIC

ethtool -g eth0

– To increase the tx and rx buffer to the max preset

ethtool -G eth0 rx 4096 tx 4096