! 
interface Ethernet0 
desc - to out newtork -
ip address x.x.x.1 255.255.255.0 
ip address y.y.y.1  255.255.255.0 secondary 
ip policy route-map fork
! 
interface Serial0 
desc - to isp1 -
ip address a.a.a.1 255.255.255.0 
! 
interface Serial1 
desc - to isp2 -
ip address b.b.b.1 255.255.255.0 
! 
access-list 1 permit x.x.x.0 0.0.0.255 
access-list 2 permit y.y.y.0 0.0.0.255
access-list 100 permit x.x.x.0 0.0.0.255 y.y.y.0 0.0.0.255
access-list 100 permit y.y.y.0 0.0.0.255 x.x.x.0 0.0.0.255 
!
route-map fork deny 10
 match ip address 100
!
route-map fork permit 20 
 match ip address 1 
 set interface Serial0 
!
route-map fork permit 30
 match ip address 2
 set interface Serial1 
!