[  523.611672] netdevsim netdevsim439 eni439np1: renamed from eth0
[  523.709295] netdevsim netdevsim669 eni669np1: renamed from eth1
[  523.942911] Could not find device with ifindex 2000 in netnsfd 11
[  523.943106] Could not find netns with fd: 2000
[  523.943192] Cannot link a netdevsim to itself
[  523.943282] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).