I was surveying some data on all the ethernet adapters in our fleet, and stumbled across these two oddball exceptions. Both es2017 and es2019 have a special ethernet device configured in Linux as device idrac with driver cdc_ether.

I think this comes from some kind of BIOS setting about "iDRAC Ethernet Passthrough to OS", which lets the OS use/see the management ethernet via some virtual USB network driver. It's probably not causing an issue yet, but it seems non-standard (these are the only two in the whole fleet) and might not be great security practice either in that it provides a pathway into the management network.