Configuration Guide Configuring Interfaces
RA(config-if)# encapsulation dot1Q 2
RA(config-if)# ip address 192.168.1.1 255.255.255.0
RA(config-if)# exit
RA(config)# interface Serial 1/0
RA(config-if)# encapsulation frame-relay
RA(config-if)# ip address 172.16.1.1 255.255.255.0
RA(config-if)# exit
RA(config)# router rip
RA(config-router)# network 192.168.1.0
RA(config-router)# network 17.16.1.0
RA(config-router)# exit
RB# configure terminal
RB(config)# interface GigabitEthernet 0/1.1
RB(config-if)# encapsulation dot1Q 2
RB(config-if)# ip address 192.168.2.1 255.255.255.0
RB(config-if)# exit
RB(config)# interface Serial 1/0
RB(config-if)# encapsulation frame-relay
RB(config-if)# ip address 172.16.1.2 255.255.255.0
RB(config-if)# exit
RB(config)# router rip
RB(config-router)# network 192.168.2.0
RB(config-router)# network 17.16.1.0
RB(config-router)# exit
SB# configure terminal
SB(config)# interface GigabitEthernet 0/1
SB(config-if)# switchport mode trunk
SB(config-if)# exit
SB(config)# interface vlan 2
SB(config-if)# ip address 192.168.2.2 255.255.255.0
SB(config-if)# exit