[  456.645102] netdevsim netdevsim475 eni475np1: renamed from eth0
[  456.645893] netdevsim netdevsim645 eni645np1: renamed from eth1
[  456.737154] Could not find device with ifindex 2000 in netnsfd 11
[  456.737251] Could not find netns with fd: 2000
[  456.737296] Cannot link a netdevsim to itself
[  456.737346] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).