[  472.620003] netdevsim netdevsim421 eni421np1: renamed from eth0
[  472.620664] netdevsim netdevsim563 eni563np1: renamed from eth1
[  472.699563] Could not find device with ifindex 2000 in netnsfd 11
[  472.699643] Could not find netns with fd: 2000
[  472.699684] Cannot link a netdevsim to itself
[  472.699732] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).