[ 1223.465743][T11140] netdevsim netdevsim605 eni605np1: renamed from eth1 [ 1223.482984][T11141] netdevsim netdevsim406 eni406np1: renamed from eth0 [ 1226.746054][T11133] Could not find device with ifindex 2000 in netnsfd 11 [ 1226.746808][T11133] Could not find netns with fd: 2000 [ 1226.747382][T11133] Cannot link a netdevsim to itself [ 1226.748012][T11133] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).