[  522.323978] netdevsim netdevsim645 eni645np1: renamed from eth1
[  522.421729] netdevsim netdevsim400 eni400np1: renamed from eth0
[  522.655228] Could not find device with ifindex 2000 in netnsfd 11
[  522.655387] Could not find netns with fd: 2000
[  522.655460] Cannot link a netdevsim to itself
[  522.655546] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).