[ 1302.535955][T11132] netdevsim netdevsim326 eni326np1: renamed from eth0 [ 1302.650012][T11130] netdevsim netdevsim764 eni764np1: renamed from eth1 [ 1306.376211][T11124] Could not find device with ifindex 2000 in netnsfd 11 [ 1306.377088][T11124] Could not find netns with fd: 2000 [ 1306.377860][T11124] Cannot link a netdevsim to itself [ 1306.378572][T11124] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).