[  516.509054] netdevsim netdevsim421 eni421np1: renamed from eth0
[  516.606291] netdevsim netdevsim716 eni716np1: renamed from eth1
[  516.843670] Could not find device with ifindex 2000 in netnsfd 11
[  516.843878] Could not find netns with fd: 2000
[  516.843964] Cannot link a netdevsim to itself
[  516.844060] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).