[  522.683784] netdevsim netdevsim523 eni523np1: renamed from eth1
[  522.779900] netdevsim netdevsim500 eni500np1: renamed from eth0
[  523.038656] Could not find device with ifindex 2000 in netnsfd 11
[  523.038834] Could not find netns with fd: 2000
[  523.038928] Cannot link a netdevsim to itself
[  523.039052] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).