[ 1231.757932][T11141] netdevsim netdevsim284 eni284np1: renamed from eth0 [ 1231.783299][T11140] netdevsim netdevsim746 eni746np1: renamed from eth1 [ 1235.096369][T11133] Could not find device with ifindex 2000 in netnsfd 11 [ 1235.097431][T11133] Could not find netns with fd: 2000 [ 1235.098066][T11133] Cannot link a netdevsim to itself [ 1235.098907][T11133] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).