[  513.931829] netdevsim netdevsim681 eni681np1: renamed from eth1
[  514.028575] netdevsim netdevsim260 eni260np1: renamed from eth0
[  514.239298] Could not find device with ifindex 2000 in netnsfd 11
[  514.239474] Could not find netns with fd: 2000
[  514.239551] Cannot link a netdevsim to itself
[  514.239653] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).