[  514.613351] netdevsim netdevsim457 eni457np1: renamed from eth0
[  514.710753] netdevsim netdevsim557 eni557np1: renamed from eth1
[  514.912767] Could not find device with ifindex 2000 in netnsfd 11
[  514.912945] Could not find netns with fd: 2000
[  514.913029] Cannot link a netdevsim to itself
[  514.913127] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).