[  521.865691] netdevsim netdevsim723 eni723np1: renamed from eth1
[  521.962336] netdevsim netdevsim333 eni333np1: renamed from eth0
[  522.228089] Could not find device with ifindex 2000 in netnsfd 11
[  522.228307] Could not find netns with fd: 2000
[  522.228408] Cannot link a netdevsim to itself
[  522.228512] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).