[  522.342422] netdevsim netdevsim421 eni421np1: renamed from eth0
[  522.439448] netdevsim netdevsim682 eni682np1: renamed from eth1
[  522.671731] Could not find device with ifindex 2000 in netnsfd 11
[  522.671969] Could not find netns with fd: 2000
[  522.672081] Cannot link a netdevsim to itself
[  522.672211] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).