My HP ProLiant DL320 G6 servers have iLO activated, firmware version is 2.15. iLO shares the same Ethernet interface with the server itself, both have of course different IP addresses. It is not possible to e.g. Telnet or HTTPS from the server itself to its iLO machine. The iLO machine simply does not respond, not even to ARP requests. However, accessing iLO from another machine in the network is working.
I also tried resetting iLO (hponcfg -r) to factory defaults -> no change.