[  931.264883][ T8105] Could not find device with ifindex 2000 in netnsfd 11
[  931.265671][ T8105] Could not find netns with fd: 2000
[  931.266247][ T8105] Cannot link a netdevsim to itself
[  931.266909][ T8105] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).