The vmkping ++netstack=geneve -d -s 1572 <destination IP address> command is used to check connectivity for VMware kernel ports specifically for Geneve tunnel endpoints (TEPs). The -s 1572 option sets the packet size to test within the 1600 MTU limit, accounting for the Geneve encapsulation overhead. The -d option enables the "Don't Fragment" bit, ensuring the packet isn't fragmented along the path, which is essential for verifying MTU consistency across the network.