[  520.599851] netdevsim netdevsim557 eni557np1: renamed from eth1
[  520.697146] netdevsim netdevsim475 eni475np1: renamed from eth0
[  520.944736] Could not find device with ifindex 2000 in netnsfd 11
[  520.944961] Could not find netns with fd: 2000
[  520.945061] Cannot link a netdevsim to itself
[  520.945178] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).