[  522.788371] netdevsim netdevsim636 eni636np1: renamed from eth1
[  522.885962] netdevsim netdevsim339 eni339np1: renamed from eth0
[  523.112991] Could not find device with ifindex 2000 in netnsfd 11
[  523.113192] Could not find netns with fd: 2000
[  523.113294] Cannot link a netdevsim to itself
[  523.113415] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).