[ 1059.068873][T12686] netdevsim netdevsim661 eni661np1: renamed from eth1 [ 1059.080516][T12687] netdevsim netdevsim256 eni256np1: renamed from eth0 [ 1060.852714][T12731] Could not find device with ifindex 2000 in netnsfd 11 [ 1060.854124][T12731] Could not find netns with fd: 2000 [ 1060.855130][T12731] Cannot link a netdevsim to itself [ 1060.856388][T12731] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).