[  519.622920] netdevsim netdevsim540 eni540np1: renamed from eth1
[  519.720290] netdevsim netdevsim393 eni393np1: renamed from eth0
[  519.968313] Could not find device with ifindex 2000 in netnsfd 11
[  519.968506] Could not find netns with fd: 2000
[  519.968588] Cannot link a netdevsim to itself
[  519.968687] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).