Symptoms
vm/vmknic traffic disconnects on software vlan untagging mode.
The issue happens only with Broadcom BCM5741x NIC.
Cause
There is an issue with the firmware programming of the CFA table entries when an interface is put in promiscuous mode. This is causing the tagged ucast traffic to get dropped.
Resolution
Currently there is no resolution to the issue. This will be fixed in a future release of the Broadcom NIC FW.
Workaround
To workaround the issue, please change software tagging as OFF, then again set it to ON.esxcli network nic software set --untagging=0 -n vmnicNesxcli network nic software set --untagging=1 -n vmnicN
Related Information
Product versions:Broadcom BCM5741x NIC FW 228.x or earlier.
