[  522.210383] netdevsim netdevsim304 eni304np1: renamed from eth0
[  522.307720] netdevsim netdevsim539 eni539np1: renamed from eth1
[  522.520407] Could not find device with ifindex 2000 in netnsfd 11
[  522.520605] Could not find netns with fd: 2000
[  522.520715] Cannot link a netdevsim to itself
[  522.520850] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).