[  492.340559] netdevsim netdevsim257 eni257np1: renamed from eth0
[  492.438112] netdevsim netdevsim722 eni722np1: renamed from eth1
[  492.702102] Could not find device with ifindex 2000 in netnsfd 11
[  492.702339] Could not find netns with fd: 2000
[  492.702451] Cannot link a netdevsim to itself
[  492.702586] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).