[  456.102566] netdevsim netdevsim456 eni456np1: renamed from eth0
[  456.106028] netdevsim netdevsim523 eni523np1: renamed from eth1
[  456.194455] Could not find device with ifindex 2000 in netnsfd 11
[  456.194571] Could not find netns with fd: 2000
[  456.194625] Cannot link a netdevsim to itself
[  456.194679] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).