[  514.819411] netdevsim netdevsim667 eni667np1: renamed from eth1
[  514.916731] netdevsim netdevsim504 eni504np1: renamed from eth0
[  515.142962] Could not find device with ifindex 2000 in netnsfd 11
[  515.143168] Could not find netns with fd: 2000
[  515.143274] Cannot link a netdevsim to itself
[  515.143391] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).