[ 1224.497544][T11141] netdevsim netdevsim386 eni386np1: renamed from eth0 [ 1224.503957][T11139] netdevsim netdevsim566 eni566np1: renamed from eth1 [ 1227.949175][T11133] Could not find device with ifindex 2000 in netnsfd 11 [ 1227.949997][T11133] Could not find netns with fd: 2000 [ 1227.950566][T11133] Cannot link a netdevsim to itself [ 1227.951546][T11133] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).