[ 1266.403887][T12843] netdevsim netdevsim521 eni521np1: renamed from eth1
[ 1266.541045][T12845] netdevsim netdevsim391 eni391np1: renamed from eth0
[ 1269.186822][T12833] Could not find device with ifindex 2000 in netnsfd 11
[ 1269.189602][T12833] Could not find netns with fd: 2000
[ 1269.190642][T12833] Cannot link a netdevsim to itself
[ 1269.191730][T12833] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).