Installation Guide: Cisco Router - Frame Relay

In the context of computer networking, frame relay consists of an efficient data transmission technique used to send digital information. It is a message forwarding "relay race" like system in which data packets, called frames, are passed from one or many start-points to one or many destinations via a series of intermediate node points.

Network providers commonly implement frame relay for voice and data as an encapsulation technique, used between local area networks (LANs) over a wide area network (WAN). Each end-user gets a private line (or leased line) to a frame-relay node. The frame-relay network handles the transmission over a frequently-changing path transparent to all end-users


Router-A Configuration Using Sub-Interface

RouterA>enable
RouterA>Password

Configure Ethernet0

RouterA#Configure Terminal
RouterA(Config)#interface ethernet0
RouterA(Config-if)#ip address 172.1.1.1 255.255.255.240
RouterA(Config-if)#no shutdown
RouterA(Config-if)#end

Configure Serial0

RouterA#Configure Terminal
RouterA(Config)#interface serial0
RouterA(Config-if)#no ip address
RouterA(Config-if)#encapsulation frame-relay
RouterA(Config-if)#interface serial0.1 point-to-point
RouterA(Config-subif)#ip address 192.168.1.1 255.255.255.252
routerA(Config-subif)#frame-relay interface-dlci 140
RouterA(Config-subif)#exit
RouterA(Config-if)#no shutdown
RouterA(Config-if)#end

Configure Routing Protocol

RouterA#Configure Terminal
RouterA(Config)#router rip
RouterA(Config-router)#network 192.168.1.0
RouterA(Config-router)#network 172.1.0.0
RouterA(Config-router)#end

Router-B Configuration Using Sub-Interface

RouterB>enable
RouterB>Password

Configure Ethernet0

RouterB#Configure Terminal
RouterB(Config)#interface ethernet0
RouterB(Config-if)#ip address 172.1.1.1 255.255.255.240
RouterB(Config-if)#no shutdown
RouterB(Config-if)#end

Configure Serial0

RouterB#Configure Terminal
RouterB(Config)#interface serial0
RouterB(Config-if)#no ip address
RouterB(Config-if)#encapsulation frame-relay
RouterB(Config-if)#interface serial0.1 point-to-point
RouterB(Config-subif)#ip address 192.168.1.1 255.255.255.252
routerB(Config-subif)#frame-relay interface-dlci 140
RouterB(Config-subif)#exit
RouterB(Config-if)#no shutdown
RouterB(Config-if)#end

Configure Routing Protocol

RouterB#Configure Terminal
RouterB(Config)#router rip
RouterB(Config-router)#network 192.168.1.0
RouterB(Config-router)#network 172.1.0.0
RouterB(Config-router)#end