[  473.739298] netdevsim netdevsim401 eni401np1: renamed from eth0
[  473.739620] netdevsim netdevsim620 eni620np1: renamed from eth1
[  473.821264] Could not find device with ifindex 2000 in netnsfd 11
[  473.821360] Could not find netns with fd: 2000
[  473.821406] Cannot link a netdevsim to itself
[  473.821459] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).