[  476.362015] netdevsim netdevsim421 eni421np1: renamed from eth0
[  476.362924] netdevsim netdevsim519 eni519np1: renamed from eth1
[  476.442014] Could not find device with ifindex 2000 in netnsfd 11
[  476.442178] Could not find netns with fd: 2000
[  476.442302] Cannot link a netdevsim to itself
[  476.442444] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).