[  491.568153] netdevsim netdevsim571 eni571np1: renamed from eth1
[  491.664719] netdevsim netdevsim456 eni456np1: renamed from eth0
[  491.890210] Could not find device with ifindex 2000 in netnsfd 11
[  491.890560] Could not find netns with fd: 2000
[  491.890646] Cannot link a netdevsim to itself
[  491.890748] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).