[  660.309353][T10002] netdevsim netdevsim256 eni256np1: renamed from eth0
[  660.336040][T10004] netdevsim netdevsim723 eni723np1: renamed from eth1
[  661.200076][ T9990] Could not find device with ifindex 2000 in netnsfd 11
[  661.200974][ T9990] Could not find netns with fd: 2000
[  661.201403][ T9990] Cannot link a netdevsim to itself
[  661.201978][ T9990] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).