[  474.080459] netdevsim netdevsim400 eni400np1: renamed from eth0
[  474.081291] netdevsim netdevsim521 eni521np1: renamed from eth1
[  474.169128] Could not find device with ifindex 2000 in netnsfd 11
[  474.169275] Could not find netns with fd: 2000
[  474.169373] Cannot link a netdevsim to itself
[  474.169484] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).