[  490.487460] netdevsim netdevsim668 eni668np1: renamed from eth1
[  490.583098] netdevsim netdevsim409 eni409np1: renamed from eth0
[  490.828997] Could not find device with ifindex 2000 in netnsfd 11
[  490.829281] Could not find netns with fd: 2000
[  490.829384] Cannot link a netdevsim to itself
[  490.829491] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).