[  455.744195] netdevsim netdevsim422 eni422np1: renamed from eth0
[  455.745071] netdevsim netdevsim621 eni621np1: renamed from eth1
[  455.843499] Could not find device with ifindex 2000 in netnsfd 11
[  455.843654] Could not find netns with fd: 2000
[  455.843769] Cannot link a netdevsim to itself
[  455.843888] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).