I added a new hp blade dl460c gen8 blade to an existing C7000 chassis. The HP BladeSystem recognizes it without issue.
I have installed ESXi 6.5 on the new blade without issue.
Created a new CentOS7 VM using the vSphere Client GUI and I cannot access the network. I can ping myself but not the GW or outside world. I do see that that the existing blades access the network via a VLAN, but the gui doesn't give me an option to attach to that VLAN.