[  513.849703] netdevsim netdevsim603 eni603np1: renamed from eth1
[  513.946317] netdevsim netdevsim420 eni420np1: renamed from eth0
[  514.178929] Could not find device with ifindex 2000 in netnsfd 11
[  514.179081] Could not find netns with fd: 2000
[  514.179151] Cannot link a netdevsim to itself
[  514.179237] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).