[  527.090488] netdevsim netdevsim657 eni657np1: renamed from eth1
[  527.187662] netdevsim netdevsim457 eni457np1: renamed from eth0
[  527.416718] Could not find device with ifindex 2000 in netnsfd 11
[  527.416883] Could not find netns with fd: 2000
[  527.416966] Cannot link a netdevsim to itself
[  527.417054] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).