[  456.792234] netdevsim netdevsim454 eni454np1: renamed from eth0
[  456.792737] netdevsim netdevsim668 eni668np1: renamed from eth1
[  456.899409] Could not find device with ifindex 2000 in netnsfd 11
[  456.899515] Could not find netns with fd: 2000
[  456.899570] Cannot link a netdevsim to itself
[  456.899633] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).