[  488.195741] netdevsim netdevsim260 eni260np1: renamed from eth0
[  488.292476] netdevsim netdevsim623 eni623np1: renamed from eth1
[  488.490911] Could not find device with ifindex 2000 in netnsfd 11
[  488.491200] Could not find netns with fd: 2000
[  488.491292] Cannot link a netdevsim to itself
[  488.491426] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).