[  843.860158][T15794] netdevsim netdevsim421 eni421np1: renamed from eth0
[  843.887733][T15796] netdevsim netdevsim559 eni559np1: renamed from eth1
[  844.520133][T15782] Could not find device with ifindex 2000 in netnsfd 11
[  844.520705][T15782] Could not find netns with fd: 2000
[  844.521165][T15782] Cannot link a netdevsim to itself
[  844.521596][T15782] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).