[  916.663583][ T8105] Could not find device with ifindex 2000 in netnsfd 11
[  916.664277][ T8105] Could not find netns with fd: 2000
[  916.664831][ T8105] Cannot link a netdevsim to itself
[  916.665474][ T8105] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).