[  523.481106] netdevsim netdevsim681 eni681np1: renamed from eth1
[  523.577118] netdevsim netdevsim483 eni483np1: renamed from eth0
[  523.857588] Could not find device with ifindex 2000 in netnsfd 11
[  523.857747] Could not find netns with fd: 2000
[  523.857851] Cannot link a netdevsim to itself
[  523.858001] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).