[ 1294.492076][T11141] netdevsim netdevsim352 eni352np1: renamed from eth0 [ 1294.504560][T11139] netdevsim netdevsim620 eni620np1: renamed from eth1 [ 1298.061302][T11133] Could not find device with ifindex 2000 in netnsfd 11 [ 1298.062010][T11133] Could not find netns with fd: 2000 [ 1298.062563][T11133] Cannot link a netdevsim to itself [ 1298.063278][T11133] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).