Configure ODR over a frame relay connection and redistribute ODR
into IGRP.
Scenario:
You have been contracted by a small bank to install a Frame Relay
network to connect their offices in Atlanta and Houston. The frame
relay cloud may grow at a later date and to avoid the headache of
numerous static routes on the Atlanta hub router, you decide to
configure ODR. You have ordered Frame Relay service from a national Frame Relay
service provider and have received the DLCIs in the
above diagram. Routing should be handled using IGRP. Lastly, the ODR
information needs to be redistributed into IGRP.
Notes:
Lab Tasks:
Cable the lab as shown in the diagram. Use the Adtran Atlas 550
to simulate the Frame Relay network.
Configure all of the serial interfaces that connect to the Frame Relay
network for Frame Relay encapsulation and set the LMI
type to ANSI.
Configure IP addresses on the interfaces as shown above.
Frame Relay map commands must be used to map the IP addresses on
the opposite end of the PVC to the associated DLCIs:
On the Atlanta router:
Atlanta(config)#int s0/0
Atlanta(config)#frame-relay map ip 192.168.4.3 18 broadcast
On the Houston router:
Houston(config)#int s0/0
Houston(config-if)#frame-relay map ip 192.168.4.1 16 broadcast
Check your PVCs to make sure they are active.
What command should be used to verify the operation of the PVCs?
If your PVCs are active, attempt to ping to each address in the
network. Record your results.
What command can be used to check your Frame Relay maps?
Configure a default route on the Houston router that sends all
packets to Atlanta.
What is the command to do this?
Verify connectivity between Houston and Atlanta.
Configure IGRP routing on the Atlanta router and advertise all
directly connected networks. Be sure to prevent updates from being
sent out the serial interface with the passive-interface command.
Examine the routing table of Atlanta. Document your findings
below. Do you see the Houston LAN advertised?
Now it is time to configure ODR. ODR requires only one command
for configuration. The command is :
Atlanta(config)#router odr
Note: Be sure that CDP is enabled on the Atlanta and Houston
Routers!
Now examine the routing table of Atlanta again. What do you
notice that is different?
ODR information can easily be redistributed into another
routing protocol. Configure the Atlanta2 router as shown in the
diagram . Configure IGRP routing for AS 100 and advertise the directly
connected networks. Verify that the IGRP routes appear in the Atlanta
and routing tables.
To redistribute ODR into IGRP, issue the following commands:
Login to the LAN router again. Did the route for 192.168.3.0
appear in the routing table?
You have now configured ODR routing with redistribution into
the core network. Whenever additional frame-relay connections are
added, the only configuration needed will be at the branch router and
a map command for frame-relay on the Atlanta router!