vmxnet3
driver uses port 4789 when a VM uses ENS and port 8472 when ENS is not enabled. As a result, when an overlay tunnel is configured from a guest VM with different default VXLAN port, vmxnet3
might drop packets.
VMware ESXi 6.7, Build Number: 18828794, (hardware versions later than 14)
Build Details
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vmxnet3
delivers packets when a VM uses either of ports 4789 or 8472. However, the fix works only on VMs with version ESXi 6.7 and later, hardware versions later than 14, and if the overlay tunnel is configured from a guest VM.GUEST UPSTREAM PATCHES:
Changes implemented by Linux kernel versions:
5.8
dacce2be33124df3c71f979ac47e3d6354a41125 ("vmxnet3: add geneve and vxlan tunnel offload support")