[Openswan Users] why openswan need to add a same route for the net of local interface but via dev ipsec0

[Wei Chen]

Hi All,
If I start ipsec, a same route for the net of local interface will be added:
192.168.5.0/24 dev ipsec0  proto kernel  scope link  src 192.168.5.62
Why do we need this kind of route ?and how can I remove this route?
Thanks!

#ip route show
192.168.100.0/24 dev ipsec0  scope link
192.168.5.0/24 dev eth0  proto kernel  scope link  src 192.168.5.62
192.168.5.0/24 dev ipsec0  proto kernel  scope link  src 192.168.5.62
default via 192.168.5.1 dev eth0