[  508.413333] netdevsim netdevsim663 eni663np1: renamed from eth1
[  508.510387] netdevsim netdevsim376 eni376np1: renamed from eth0
[  508.722137] Could not find device with ifindex 2000 in netnsfd 11
[  508.722320] Could not find netns with fd: 2000
[  508.722405] Cannot link a netdevsim to itself
[  508.722502] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).