step by step configuration of frame relay how to configure frame realy

Configuration of Frame Relay

Configuring Frame Relay involves the following steps:

Chang the encapsulation

Go in interface mode and select the Frame Relay encapsulation on the interface. There are two types of Frame Relay encapsulations: Cisco and IETF. Cisco is the default. The syntax to set your encapsulation is

encapsulation frame-relay [ietf]

Configuring the LMI type

The three LMI types are Cisco, Ansi, and Q933a. For IOS 11.2 and higher, the LMI type is automatically detected

frame-relay lmi-type [cisco | ansi | 933a]

Configuring the Frame Relay map

configuring a static Frame Relay map, is optional unless you are using subinterfaces. The Frame Relay map will map a Layer 3 address to a local DLCI. This step is optional because inverse-arp will automatically perform this map for you. The syntax for a Frame Relay map is as follows:

frame-relay map protocol address dlci [broadcast] [cisco | ietf]

Configuring subinterfaces

If you are using a routing protocol in a hub-and-spoke topology, you will probably want to use subinterfaces to avoid the split-horizon problem. To configure a subinterface, remove the IP address off the main interface and put it under the subinterface. Configuring a subinterface involves assigning it a number and specifying the type. The following command creates point-to-point subinterface serial0/0.1

Router(config)#interface serial0/0.1 point-to-point

To create a multipoint subinterface, enter multipoint instead:

Router(config)#interface serial0/0.1 multipoint

Assign IP address to subinterface

After entering one of these commands you will be taken to the subinterface configuration mode where you can enter your IP address:

Router(config-subif)#ip address 10.0.0.2 255.0.0.0

If you are using a point-to-point subinterface, you will need to assign a DLCI to the subinterface. This is only for point-to-point subinterfaces; this is not needed on the main interface or on multipoint subinterfaces. To assign a DLCI to a point-to-point subinterface, enter the following command under the subinterface:

frame-relay interface-dlci dlci

Configuration of Frame Relay

Lets practically implement whatever you learn so far. Download this pre configured topology and load it in packet tracer.

Download topology for packet tracer

Now first configure R1. Fast Ethernet port and hostname is already configured. Double click on R1 and configure serial port for frame relay encapsulation and further create sub interface for connecting R2, R3, R4. Configure also static route for connecting remaining network.

Configure R1

R1>enable
R1#configure terminal
R1(config)#interface serial 0/0/0
R1(config-if)#encapsulation frame-relay
R1(config-if)#no shutdown
R1(config-if)#exit
R1(config-subif)#interface serial 0/0/0.102 point-to-point
R1(config-subif)#ip address 192.168.1.245 255.255.255.252
R1(config-subif)#frame-relay interface-dlci 102
R1(config-subif)#exit
R1(config)#interface serial 0/0/0.103 point-to-point
R1(config-subif)#ip address 192.168.1.249 255.255.255.252
R1(config-subif)#frame-relay interface-dlci 103
R1(config-subif)#exit
R1(config)#interface serial 0/0/0.104 point-to-point
R1(config-subif)#ip address 192.168.1.253 255.255.255.252
R1(config-subif)#frame-relay interface-dlci 104
R1(config-subif)#exit
R1(config)#ip route 192.168.1.64 255.255.255.224 192.168.1.246
R1(config)#ip route 192.168.1.96 255.255.255.224 192.168.1.250
R1(config)#ip route 192.168.1.128 255.255.255.224 192.168.1.254
R1(config)#exit

configure R2

R2>enable
R2#configure terminal
R2(config)#interface serial 0/0/0
R2(config-if)#encapsulation frame-relay
R2(config-if)#no shutdown
R2(config-if)#exit
R2(config)#interface serial 0/0/0.101 point-to-point
R2(config-subif)#ip address 192.168.1.246 255.255.255.252
R2(config-subif)#frame-relay interface-dlci 101
R2(config-subif)#exit
R2(config)#ip route 0.0.0.0 0.0.0.0 192.168.1.245

configure R3

R3>enable
R3#configure terminal
R3(config)#interface serial 0/0/0
R3(config-if)#encapsulation frame-relay
R3(config-if)#no shutdown
R3(config-if)#exit
R3(config)#interface serial 0/0/0.101 point-to-point
R3(config-subif)#ip address 192.168.1.250 255.255.255.252
R3(config-subif)#frame-relay interface-dlci 101
R3(config-subif)#exit
R3(config)#ip route 0.0.0.0 0.0.0.0 192.168.1.249
R3(config)#

configure R4

R4>enable
R4#configure terminal
R4(config)#interface serial 0/0/0
R4(config-if)#encapsulation frame-relay
R4(config-if)#no shutdown
R4(config-if)#exit
R4(config)#interface serial 0/0/0.101 point-to-point
R4(config-subif)#ip address 192.168.1.254 255.255.255.252
R4(config-subif)#frame-relay interface-dlci 101
R4(config-subif)#exit
R4(config)#ip route 0.0.0.0 0.0.0.0 192.168.1.253
R4(config)#

now verify by doing ping from pc0 to all pc. It should be ping successfully. I have uploaded a configured topology but use it as the final resort first try yourself to configure it.

Donload Configured Frame Relay