[ 1185.755404][T10974] Could not find device with ifindex 2000 in netnsfd 11
[ 1185.756096][T10974] Could not find netns with fd: 2000
[ 1185.756621][T10974] netdevsim netdevsim385 eth0: Cannot link a netdevsim to itself
[ 1185.757396][T10974] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).