[  522.647733] netdevsim netdevsim623 eni623np1: renamed from eth1
[  522.744660] netdevsim netdevsim447 eni447np1: renamed from eth0
[  522.980081] Could not find device with ifindex 2000 in netnsfd 11
[  522.980267] Could not find netns with fd: 2000
[  522.980364] Cannot link a netdevsim to itself
[  522.980500] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).