[  507.491270] netdevsim netdevsim422 eni422np1: renamed from eth0
[  507.588811] netdevsim netdevsim666 eni666np1: renamed from eth1
[  507.781025] Could not find device with ifindex 2000 in netnsfd 11
[  507.781177] Could not find netns with fd: 2000
[  507.781254] Cannot link a netdevsim to itself
[  507.781346] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).