[  523.238436] netdevsim netdevsim672 eni672np1: renamed from eth1
[  523.336994] netdevsim netdevsim256 eni256np1: renamed from eth0
[  523.582596] Could not find device with ifindex 2000 in netnsfd 11
[  523.582813] Could not find netns with fd: 2000
[  523.582912] Cannot link a netdevsim to itself
[  523.583033] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).