[ 1016.386589][T12062] netdevsim netdevsim296 eni296np1: renamed from eth0 [ 1016.393557][T12061] netdevsim netdevsim761 eni761np1: renamed from eth1 [ 1018.252554][T12447] Could not find device with ifindex 2000 in netnsfd 11 [ 1018.253523][T12447] Could not find netns with fd: 2000 [ 1018.254244][T12447] Cannot link a netdevsim to itself [ 1018.255084][T12447] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).