Generally speaking HP ProLiant Gen6 is not officially supported since ESXi 6.5 and looks like you are beating a dead horse. Also if you use HPE customised ESXi installation ISO for 6.5/6.7 (with pre-integrated HP drivers/vibs) you're gonna hit the PSOD. Don't get me wrong, I'm sure you can get the latest esxi 6.7 up and running on G6 but with questionable success as you can never be sure if everything is as it should be ... because of the drivers. Anyway, your real problem revolves around NIC drivers (vibs) of ESXi 6.7 and the lack of support for dead horses like G6. The issue is not only observed for CHR. The easiest option is to downgrade the hypervisior to 6.0. If you want it hard enough then you have to play with esxi 6.5/6.7 and different NIC vibs in order to find the best possible/workable option.