[  848.356626][T14833] netdevsim netdevsim503 eni503np1: renamed from eth0
[  848.375605][T14835] netdevsim netdevsim539 eni539np1: renamed from eth1
[  849.100418][T14821] Could not find device with ifindex 2000 in netnsfd 11
[  849.101332][T14821] Could not find netns with fd: 2000
[  849.101818][T14821] Cannot link a netdevsim to itself
[  849.102394][T14821] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).