[ 1331.427722][T11139] netdevsim netdevsim753 eni753np1: renamed from eth1 [ 1331.464827][T11141] netdevsim netdevsim326 eni326np1: renamed from eth0 [ 1335.212071][T11133] Could not find device with ifindex 2000 in netnsfd 11 [ 1335.212828][T11133] Could not find netns with fd: 2000 [ 1335.213468][T11133] Cannot link a netdevsim to itself [ 1335.214191][T11133] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).