[  454.468685] netdevsim netdevsim503 eni503np1: renamed from eth0
[  454.469425] netdevsim netdevsim722 eni722np1: renamed from eth1
[  454.556059] Could not find device with ifindex 2000 in netnsfd 11
[  454.556201] Could not find netns with fd: 2000
[  454.556310] Cannot link a netdevsim to itself
[  454.556425] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).