[  512.345954] netdevsim netdevsim723 eni723np1: renamed from eth1
[  512.442685] netdevsim netdevsim269 eni269np1: renamed from eth0
[  512.635329] Could not find device with ifindex 2000 in netnsfd 11
[  512.635519] Could not find netns with fd: 2000
[  512.635605] Cannot link a netdevsim to itself
[  512.635707] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).