[  489.216920] netdevsim netdevsim421 eni421np1: renamed from eth0
[  489.217795] netdevsim netdevsim655 eni655np1: renamed from eth0
[  489.300166] Could not find device with ifindex 2000 in netnsfd 11
[  489.300276] Could not find netns with fd: 2000
[  489.300327] Cannot link a netdevsim to itself
[  489.300383] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).