After you change it to UEFI boot mode restart and go back into system BIOS. Then you should be able to enter boot settings. You will then need to use the scroll bar on the right to scroll down to see the IPV4/IPV6 option. I just tested this on one of my R720XDs, and the instructions in the guide are correct. Thanks
Hi, 1. I am currently using 5 Dell PowerEdge R720xd server (Processor : Intel Xenon) to setup cluster nodes from my Main server which have DHCP server (IPv6 only), complete pxe setup for pxe boot of all the dell nodes. 2. Dell PowerEdge R720xd server do not support pxe over IPv6. Kindly suggests how to solve this issue. //Ankit
iPXE over IPv6