Friday, June 17, 2011

How to configure Frame-Relay on GNS3

How to configure Multipoint and Point-To-Point Frame Relay topology on GNS3
MULTIPOINT TOPOLOGY
Here is the topology I am going to use in GNS3:

1.       Configure the FR1 switch as on the following screen:

2.       Now, it is time to configure R1,R2,R3 serial interfaces:
R1(config)#int s0/0
R1(config-if)#no shut
R1(config-if)#encapsulation frame-relay
R1(config)#int s0/0.1 multipoint
R1(config-subif)#ip address 192.168.1.1 255.255.255.248
R1(config-subif)#frame-relay map ip 192.168.1.2 101 broadcast
R1(config-subif)#frame-relay map ip 192.168.1.3 102 broadcast


3.       R2(config)#int s0/0
R2(config-if)#no shut
R2(config-if)#encapsulation frame-relay
R2(config)#int s0/0.1 multipoint
R2(config-subif)#ip address 192.168.1.2 255.255.255.248
R2(config-subif)#frame-relay map ip 192.168.1.1 201 broadcast

4.       R3(config)#int s0/0
R3(config-if)#no shut
R3(config-if)#encapsulation frame-relay
R3(config)#int s0/0.1 multipoint
R3(config-subif)#ip address 192.168.1.3 255.255.255.248
R3(config-subif)#frame-relay map ip 192.168.1.1 203 broadcast

Note: Remember when configuring maps, make sure your destination DLCI is your local DLCI and not the remote one!
5.       Ping your neighbors to verify connectivity.

POINT-TO-POINT TOPOLOGY
Note: With Point-To-Point we will assign two different /30 subnets, one per each PVC.


Let’s configure the Routers.
1.       R1(config)#int s0/0
R1(config-if)#no shut
R1(config-if)#encapsulation frame-relay
R1(config)#int s0/0.1 point-to-point
R1(config-subif)#ip address 192.168.1.1 255.255.255.252
R1(config-subif)#frame-relay interface-dlci 101

2.       R1(config)#int s0/0
R1(config-if)#no shut
R1(config-if)#encapsulation frame-relay
R1(config)#int s0/0.2 point-to-point
R1(config-subif)#ip address 192.168.1.5 255.255.255.252
R1(config-subif)#frame-relay interface-dlci 102

3.       R2(config)#int s0/0
R2(config-if)#no shut
R2(config-if)#encapsulation frame-relay
R2(config)#int s0/0.1 point-to-point
R2(config-subif)#ip address 192.168.1.2 255.255.255.252
R3(config-subif)#frame-relay interface-dlci 201

4.       R3(config)#int s0/0
R3(config-if)#no shut
R3(config-if)#encapsulation frame-relay
R3(config)#int s0/0.1 point-to-point
R3(config-subif)#ip address 192.168.1.6 255.255.255.252
R1(config-subif)#frame-relay interface-dlci 202

5.       Ping your neighbors to verify the connectivity.
6.       ENJOY!

1 comment:

victoria said...

Good info. Purely technical and logical.


Point to multipoint

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