[  487.059900] netdevsim netdevsim464 eni464np1: renamed from eth0
[  487.159939] netdevsim netdevsim621 eni621np1: renamed from eth1
[  487.542316] Could not find device with ifindex 2000 in netnsfd 11
[  487.542479] Could not find netns with fd: 2000
[  487.542580] Cannot link a netdevsim to itself
[  487.542681] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).