[  521.595110] netdevsim netdevsim453 eni453np1: renamed from eth0
[  521.693532] netdevsim netdevsim631 eni631np1: renamed from eth1
[  521.909602] Could not find device with ifindex 2000 in netnsfd 11
[  521.909753] Could not find netns with fd: 2000
[  521.909888] Cannot link a netdevsim to itself
[  521.909976] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).