[  456.278385] netdevsim netdevsim391 eni391np1: renamed from eth0
[  456.279009] netdevsim netdevsim731 eni731np1: renamed from eth1
[  456.373729] Could not find device with ifindex 2000 in netnsfd 11
[  456.373829] Could not find netns with fd: 2000
[  456.373871] Cannot link a netdevsim to itself
[  456.373917] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).