[ 1079.347132][T11105] Could not find device with ifindex 2000 in netnsfd 11
[ 1079.347841][T11105] Could not find netns with fd: 2000
[ 1079.348376][T11105] Cannot link a netdevsim to itself
[ 1079.348992][T11105] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).