[  487.570665] netdevsim netdevsim453 eni453np1: renamed from eth0
[  487.667644] netdevsim netdevsim637 eni637np1: renamed from eth1
[  487.873380] Could not find device with ifindex 2000 in netnsfd 11
[  487.873741] Could not find netns with fd: 2000
[  487.873835] Cannot link a netdevsim to itself
[  487.873952] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).