HQ : Router 1
　　
　　class-map match-all OFIS_TO_MCU
　　match access-group 100
　　class-map match-all MCU_TO_OFIS
　　match access-group 101
　　!
　　policy-map TO_MCU
　　class OFIS_TO_MCU
　　priority 1518
　　set ip precedence 5
　　class class-default
　　fair-queue
　　policy-map TO_OFIS
　　class MCU_TO_OFIS
　　priority 1518
　　set ip precedence 5
　　class class-default
　　fair-queue
　　!
　　interface FastEthernet1/0/0
　　no ip address
　　ip route-cache policy
　　no ip route-cache distributed
　　full-duplex
　　!
　　interface FastEthernet1/0/0.1
　　description HQ1 LAN
　　encapsulation dot1Q 1
　　ip address 129.2.80.21 255.255.0.0
　　service-policy output TO_MCU
　　!
　　interface Serial1/0/0
　　description Router 1 to ROUTER 2
　　ip address 206.141.24.1 255.255.255.0
　　ip route-cache policy
　　no ip route-cache distributed
　　service-policy output TO_OFIS
　　!
　　access-list 100 permit ip host 141.2.20.20 host 129.2.20.34 precedence critical
　　access-list 101 permit ip host 129.2.20.34 host 141.2.20.20 precedence critical
　　!
　　
　　In between router : Router 2
　　
　　class-map OFIS_TO_MCU
　　match access-group 100
　　class-map MCU_TO_OFIS
　　match access-group 101
　　!
　　!
　　policy-map TO_MCU
　　class OFIS_TO_MCU
　　priority 1518
　　class class-default
　　fair-queue
　　policy-map TO_OFIS
　　class MCU_TO_OFIS
　　priority 1518
　　class class-default
　　fair-queue
　　
　　!
　　interface Serial2/0
　　description Router 2 to Router 1
　　bandwidth 2048
　　ip address 206.141.24.2 255.255.255.0
　　no ip directed-broadcast
　　ip route-cache policy
　　no ip mroute-cache
　　service-policy output TO_MCU
　　
　　!
　　interface Serial2/1
　　description Router 2 to Router 3
　　bandwidth 2048
　　ip address 218.141.2.1 255.255.255.0
　　no ip directed-broadcast
　　ip route-cache policy
　　service-policy output TO_OFIS
　　!
　　access-list 100 permit ip host 141.2.20.20 host 129.2.20.34 precedence critical
　　access-list 101 permit ip host 129.2.20.34 host 141.2.20.20 precedence critical
　　
　　
　　Remote side : Router 3
　　
　　class-map OFIS_TO_MCU
　　match access-group 100
　　class-map MCU_TO_OFIS
　　match access-group 101
　　!
　　!
　　policy-map TO_MCU
　　class OFIS_TO_MCU
　　priority 1518
　　class class-default
　　fair-queue
　　policy-map TO_OFIS
　　class MCU_TO_OFIS
　　priority 1518
　　class class-default
　　fair-queue
　　!
　　interface FastEthernet0/0
　　ip address 141.2.81.20 255.255.0.0
　　no ip directed-broadcast
　　ip route-cache policy
　　speed 100
　　full-duplex
　　!
　　interface Serial0/0
　　description Router 3 To Router 2
　　bandwidth 2048
　　ip address 218.141.2.2 255.255.255.0
　　no ip directed-broadcast
　　ip route-cache policy
　　no ip mroute-cache
　　service-policy output TO_MCU
　　!
　　access-list 100 permit ip host 141.2.20.20 host 129.2.20.34 precedence critical
　　access-list 101 permit ip host 129.2.20.34 host 141.2.20.20 precedence critical