[  517.799967] netdevsim netdevsim640 eni640np1: renamed from eth1
[  517.897169] netdevsim netdevsim491 eni491np1: renamed from eth0
[  518.137470] Could not find device with ifindex 2000 in netnsfd 11
[  518.137668] Could not find netns with fd: 2000
[  518.137754] Cannot link a netdevsim to itself
[  518.137856] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).