[  511.814343] netdevsim netdevsim633 eni633np1: renamed from eth1
[  511.911780] netdevsim netdevsim421 eni421np1: renamed from eth0
[  512.107373] Could not find device with ifindex 2000 in netnsfd 11
[  512.107511] Could not find netns with fd: 2000
[  512.107581] Cannot link a netdevsim to itself
[  512.107667] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).