[Click] Help, how to route according to source IP address of an IP packet

[wubaochuan]

hi everyone,
        The IPv4 Routing elements can route IP packets according to the 
destination address of IP packets, How to route IP packets according to 
source address of IP packets? I want to forward all IP packets from 
10.2.2.0/24 to a machine.
       Thank you.
Yours
Chuan