[ 1214.023275][T11151] netdevsim netdevsim320 eni320np1: renamed from eth0 [ 1214.133593][T11149] netdevsim netdevsim620 eni620np1: renamed from eth1 [ 1217.281139][T11143] Could not find device with ifindex 2000 in netnsfd 11 [ 1217.281897][T11143] Could not find netns with fd: 2000 [ 1217.282500][T11143] Cannot link a netdevsim to itself [ 1217.283249][T11143] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).