[  520.740110] netdevsim netdevsim515 eni515np1: renamed from eth1
[  520.838481] netdevsim netdevsim299 eni299np1: renamed from eth0
[  521.071100] Could not find device with ifindex 2000 in netnsfd 11
[  521.071245] Could not find netns with fd: 2000
[  521.071318] Cannot link a netdevsim to itself
[  521.071429] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).