[  523.667460] netdevsim netdevsim647 eni647np1: renamed from eth1
[  523.764335] netdevsim netdevsim305 eni305np1: renamed from eth0
[  523.995528] Could not find device with ifindex 2000 in netnsfd 11
[  523.995718] Could not find netns with fd: 2000
[  523.995809] Cannot link a netdevsim to itself
[  523.995923] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).