[  437.425814] netdevsim netdevsim500 eni500np1: renamed from eth0
[  437.527783] netdevsim netdevsim530 eni530np1: renamed from eth1
[  437.876463] Could not find device with ifindex 2000 in netnsfd 11
[  437.876617] Could not find netns with fd: 2000
[  437.876683] Cannot link a netdevsim to itself
[  437.876765] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).