[  520.917231] netdevsim netdevsim522 eni522np1: renamed from eth1
[  521.014475] netdevsim netdevsim472 eni472np1: renamed from eth0
[  521.234700] Could not find device with ifindex 2000 in netnsfd 11
[  521.234868] Could not find netns with fd: 2000
[  521.234943] Cannot link a netdevsim to itself
[  521.235042] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).