[  517.600143] netdevsim netdevsim557 eni557np1: renamed from eth1
[  517.697411] netdevsim netdevsim497 eni497np1: renamed from eth0
[  517.936752] Could not find device with ifindex 2000 in netnsfd 11
[  517.936965] Could not find netns with fd: 2000
[  517.937043] Cannot link a netdevsim to itself
[  517.937149] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).