[  488.012928] netdevsim netdevsim666 eni666np1: renamed from eth1
[  488.109912] netdevsim netdevsim420 eni420np1: renamed from eth0
[  488.333920] Could not find device with ifindex 2000 in netnsfd 11
[  488.334180] Could not find netns with fd: 2000
[  488.334295] Cannot link a netdevsim to itself
[  488.334433] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).