The following settings are to be configured only for 1 GbE Intel ports with an e1000 driver.
Edit the BAR data network adapter file /etc/modprobe.conf.local on each BAR server:
# options e1000 \ TxDescriptors=4096,4096,4096,4096,4096,4096,4096,4096, 4096,4096,4096,4096 \ RxDescriptors=4096,4096,4096,4096,4096,4096,4096,4096, 4096,4096,4096,4096 \ InterruptThrottleRate=0,0,0,0,0,0,0,0,0,0,0,0 \ RxIntDelay=0,0,0,0,0,0,0,0,0,0,0,0 \ RxAbsIntDelay=0,0,0,0,0,0,0,0,0,0,0,0 \ TxIntDelay=0,0,0,0,0,0,0,0,0,0,0,0 \ TxAbsIntDelay=0,0,0,0,0,0,0,0,0,0,0,0 #
Save the changes and exit the file.
Reboot the BAR server for the settings to take effect.