R2#sh run | b interface Serial1/2
interface Serial1/2
 ip address 180.40.7.2 255.255.255.224
 ip rip triggered   <---------------------- problem 6
 ip rip authentication mode md5
 ip rip authentication key-chain Prob4
 clock rate 64000
!
router rip
 version 2
 timers basic 30 180 0 240
 redistribute eigrp 100 metric 2 route-map Prob5
 passive-interface FastEthernet0/1
 passive-interface Serial1/0.2
 output-delay 10  <------------------ problem 7
 network 180.40.0.0
 network 208.28.1.0
 neighbor 208.28.1.2
 maximum-paths 3   <--------------  problem 9 on R1, R2 and R3
 no auto-summary
!


R3#sh run | b interface Serial1/2
interface Serial1/2
 ip address 180.40.7.3 255.255.255.224
 ip rip triggered   <---------------------- problem 6
 ip rip authentication mode md5
 ip rip authentication key-chain Prob4
!
router rip
 version 2
 no validate-update-source   <------------------ problem 8
 timers basic 30 180 0 240
 network 180.40.0.0
 network 208.28.1.0
 neighbor 208.28.1.3
 neighbor 208.28.1.1
 maximum-paths 3   <--------------  problem 9
 no auto-summary
!