Thank you Sandy, here are the answers:
1. ArchLinux (rolling release distro, mine is up to date), but for my tests I use kernel 4.4.6
2. Adapter 82579LM, driver e1000e version from the kernel so 3.2.6-k
If that matters, here are the characteristics for the laptop on the other end of the cable:
1. ArchLinux, up to date, kernel 4.5.1
2. Adapter I217-LM, driver e1000e version from the kernel so also 3.2.6-k