[ 1019.325998][T12063] netdevsim netdevsim521 eni521np1: renamed from eth1
[ 1019.429445][T12129] netdevsim netdevsim375 eni375np1: renamed from eth0
[ 1021.393081][T12549] Could not find device with ifindex 2000 in netnsfd 11
[ 1021.395004][T12549] Could not find netns with fd: 2000
[ 1021.396427][T12549] Cannot link a netdevsim to itself
[ 1021.397683][T12549] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).