[  517.848687] netdevsim netdevsim638 eni638np1: renamed from eth1
[  517.946542] netdevsim netdevsim345 eni345np1: renamed from eth0
[  518.160694] Could not find device with ifindex 2000 in netnsfd 11
[  518.160860] Could not find netns with fd: 2000
[  518.160957] Cannot link a netdevsim to itself
[  518.161058] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).