[ 1235.844917][T11140] netdevsim netdevsim268 eni268np1: renamed from eth0 [ 1235.872564][T11138] netdevsim netdevsim543 eni543np1: renamed from eth1 [ 1238.920853][T11132] Could not find device with ifindex 2000 in netnsfd 11 [ 1238.921584][T11132] Could not find netns with fd: 2000 [ 1238.922160][T11132] Cannot link a netdevsim to itself [ 1238.923111][T11132] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).