[  542.458929] netdevsim netdevsim404 eni404np1: renamed from eth0
[  542.558789] netdevsim netdevsim623 eni623np1: renamed from eth1
[  542.904822] Could not find device with ifindex 2000 in netnsfd 11
[  542.904990] Could not find netns with fd: 2000
[  542.905084] Cannot link a netdevsim to itself
[  542.905201] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).