As seen below, Linux(3.7-trunk-686-pae) keeps route to 10.10.12.64/28 in routing table although the interface is physically down:root@kali:~# ip addr show dev eth02: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000    link/ether b4:99:ba:57:7c:5f brd ff:ff:ff:ff:ff:ff    inet 10.10.12.77/28 scope global eth0root@kali:~# ip route show dev eth010.10.12.64/28  proto kernel  scope link  src 10.10.12.77 root@kali:~# ip route get 10.10.12.6910.10.12.69 dev eth0  src 10.10.12.77     cache root@kali:~# Route is removed from the routing table if I disable the interface administratively(ip link set dev eth0 down).What is the purpose to keep the route in routing table while the interface itself is physically down? For example if the more-specific route 10.10.12.64/28 would not be present while the interface is down, then the traffic could be sent to less-specific route(for example 0.0.0.0/0) to another interface which is up.
Why doesn't Linux remove route from routing table if interface is physically down?
kali linux;routing