[  521.830748] netdevsim netdevsim663 eni663np1: renamed from eth1
[  521.927637] netdevsim netdevsim397 eni397np1: renamed from eth0
[  522.191558] Could not find device with ifindex 2000 in netnsfd 11
[  522.191749] Could not find netns with fd: 2000
[  522.191826] Cannot link a netdevsim to itself
[  522.191927] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).