When a system uses the tg3 driver with 1 Gb NICs the logs report excessive NetQueue messages similar to:
… cpu14:2091)<6>tg3 : vmnic3: RX NetQ allocated on 1
… cpu14:2091)<6>tg3 : vmnic3: NetQ set RX Filter: 1 [00:50:56:7f:96:94 0]
… cpu12:2091)<6>tg3 : vmnic3: NetQ remove RX filter: 1
… cpu12:2091)<6>tg3 : vmnic3: Free NetQ RX Queue: 1
This issue is seen to occur on Broadcom 5719/5720 NICs where the NICs stop functioning or responding when used for NFS or virtual machine network traffic
To work around this issue turn off NetQueue
# esxcli system settings kernel set -s netNetqueueEnabled -v FALSE
# reboot