[  512.650080] netdevsim netdevsim684 eni684np1: renamed from eth1
[  512.746856] netdevsim netdevsim400 eni400np1: renamed from eth0
[  512.968074] Could not find device with ifindex 2000 in netnsfd 11
[  512.968313] Could not find netns with fd: 2000
[  512.968416] Cannot link a netdevsim to itself
[  512.968543] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).