[  522.608696] netdevsim netdevsim723 eni723np1: renamed from eth1
[  522.705245] netdevsim netdevsim444 eni444np1: renamed from eth0
[  522.920764] Could not find device with ifindex 2000 in netnsfd 11
[  522.920978] Could not find netns with fd: 2000
[  522.921078] Cannot link a netdevsim to itself
[  522.921222] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).