[  521.387954] netdevsim netdevsim542 eni542np1: renamed from eth1
[  521.484291] netdevsim netdevsim447 eni447np1: renamed from eth0
[  521.737662] Could not find device with ifindex 2000 in netnsfd 11
[  521.737901] Could not find netns with fd: 2000
[  521.738004] Cannot link a netdevsim to itself
[  521.738136] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).