[  486.413502] netdevsim netdevsim421 eni421np1: renamed from eth0
[  486.414282] netdevsim netdevsim724 eni724np1: renamed from eth1
[  486.511477] Could not find device with ifindex 2000 in netnsfd 11
[  486.511647] Could not find netns with fd: 2000
[  486.511802] Cannot link a netdevsim to itself
[  486.511942] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).