[ 1225.495976][T11143] netdevsim netdevsim288 eni288np1: renamed from eth0 [ 1225.534077][T11142] netdevsim netdevsim587 eni587np1: renamed from eth1 [ 1228.913563][T11135] Could not find device with ifindex 2000 in netnsfd 11 [ 1228.914744][T11135] Could not find netns with fd: 2000 [ 1228.915643][T11135] Cannot link a netdevsim to itself [ 1228.916788][T11135] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).