[  487.380830] netdevsim netdevsim668 eni668np1: renamed from eth1
[  487.481185] netdevsim netdevsim431 eni431np1: renamed from eth0
[  487.854235] Could not find device with ifindex 2000 in netnsfd 11
[  487.854398] Could not find netns with fd: 2000
[  487.854490] Cannot link a netdevsim to itself
[  487.854589] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).