[  473.682213] netdevsim netdevsim481 eni481np1: renamed from eth0
[  473.684579] netdevsim netdevsim750 eni750np1: renamed from eth1
[  473.772111] Could not find device with ifindex 2000 in netnsfd 11
[  473.772201] Could not find netns with fd: 2000
[  473.772248] Cannot link a netdevsim to itself
[  473.772301] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).