31 Days Before Your CCNA Exam

Day 2 347Note The broadcast keyword is required when the router needs to send broadcasts ormulticasts to the neighboring router—for example, to support routing protocol messagessuch as Hellos.Partial Mesh with One Subnet per PVCThe network in Figure 2-10 is a modification of Figure 2-9. R2 is now serving as the hub routerfor the spoke routers R1 and R2. This reduces the cost of the Frame Relay implementation fromthree PVCs to two PVCs. This configuration uses one subnet per PVC and point-to-point subinterfaces.Examples 2-6 through 2-8 show the configuration for this network.Figure 2-10Partial Mesh Topology with One Subnet per PVC10.1.1.0/24S0/0/0.10210.1.1.2/24DLCI 102 DLCI 201S0/0/0.20110.1.1.1/24R2 R1Frame RelayS0/0/0.20310.3.3.1/24DLCI 203S0/0/0.30210.3.3.3/2410.3.3.0/24DLCI 302R1Fa0/1192.168.10.1/24R3Fa0/1192.168.30.1/24Example 2-6Frame Relay Partial Mesh with One Subnet per PVC: R2R2(config)#interface serial 0/0/0R2(config-if)#encapsulation frame-relayR2(config-if)#interface serial 0/0/0.201R2(config-if)#interface serial 0/0/0.201 point-to-pointR2(config-subif)#ip address 10.1.1.1 255.255.255.0R2(config-subif)#frame-relay interface-dlci 201R2(config-subif)#interface serial 0/0/0.203 point-to-pointR2(config-subif)#ip address 10.3.3.1 255.255.255.0R2(config-subif)#frame-relay interface-dlci 203Example 2-7Frame Relay Partial Mesh with One Subnet per PVC: R1R1(config-if)#encapsulation frame-relayR1(config)#interface serial0/0/0.102 point-to-pointR1(config-subif)#ip address 10.1.1.2 255.255.255.0R1(config-subif)#frame-relay interface-dlci 102