[  497.393440] netdevsim netdevsim640 eni640np1: renamed from eth1
[  497.489473] netdevsim netdevsim337 eni337np1: renamed from eth0
[  497.727967] Could not find device with ifindex 2000 in netnsfd 11
[  497.728451] Could not find netns with fd: 2000
[  497.728577] Cannot link a netdevsim to itself
[  497.728725] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).