[  484.221809] netdevsim netdevsim621 eni621np1: renamed from eth1
[  484.322723] netdevsim netdevsim418 eni418np1: renamed from eth0
[  484.690270] Could not find device with ifindex 2000 in netnsfd 11
[  484.690413] Could not find netns with fd: 2000
[  484.690489] Cannot link a netdevsim to itself
[  484.690576] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).