[ 86.977124][ T741] netdevsim netdevsim269 eni269np1: renamed from eth0 [ 87.086443][ T739] netdevsim netdevsim594 eni594np1: renamed from eth1 [ 90.784631][ T733] Could not find device with ifindex 2000 in netnsfd 11 [ 90.785434][ T733] Could not find netns with fd: 2000 [ 90.786073][ T733] Cannot link a netdevsim to itself [ 90.787051][ T733] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).