Main router

interface FastEthernet0/0
 ip address 172.31.129.70 255.255.255.248 secondary
 ip address 10.139.148.131 255.255.255.128
 ip helper-address 10.103.188.254
 ip helper-address 10.236.188.254
 no ip redirects
 duplex auto
 speed auto
 standby 1 ip 10.139.148.129
 standby 1 priority 110
 standby 1 preempt

!
interface Serial0/1/0
 no ip address
 encapsulation frame-relay
 logging event subif-link-status
 logging event dlci-status-change
 no fair-queue
 cdp enable
!
interface Serial0/1/0.1 point-to-point
 ip address x.x.x.x 255.255.255.252
 frame-relay interface-dlci 50 IETF   
!

router rip
 version 2
 redistribute connected
 redistribute static
 passive-interface default
 no passive-interface FastEthernet0/0
 no passive-interface Serial0/1/0.1
 network 10.0.0.0
 network xx.0.0.0
 distribute-list 1 out Serial0/1/0.1
 distribute-list 2 in Serial0/1/0.1
 no auto-summary