[  793.000244][T15627] netdevsim netdevsim421 eni421np1: renamed from eth0
[  793.009258][T15628] netdevsim netdevsim666 eni666np1: renamed from eth1
[  793.640392][T15615] Could not find device with ifindex 2000 in netnsfd 11
[  793.641066][T15615] Could not find netns with fd: 2000
[  793.641551][T15615] Cannot link a netdevsim to itself
[  793.642090][T15615] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).