[  491.663484] netdevsim netdevsim750 eni750np1: renamed from eth1
[  491.755717] netdevsim netdevsim307 eni307np1: renamed from eth0
[  492.070546] Could not find device with ifindex 2000 in netnsfd 11
[  492.070914] Could not find netns with fd: 2000
[  492.071043] Cannot link a netdevsim to itself
[  492.071205] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).