Frame Relay Point-to-Point Lab - The Cisco Learning Network

Frame Relay Point-to-Point Lab
Objective
• Familiarize yourself with configuring Frame Relay point-to-point
connections using sub-interfaces
• Familiarize yourself with Cisco frame relay show commands.
Router configurations:
As with other router configurations, you can type this directly in the
configuration or Copy and Paste from a Notepad file.
Setup Information:
We will be using a pair of Paradyne Frame-Saver devices with four RS-530
ports as our Frame Relay network. The units are pre-configured with PVCs
as noted in the diagram above. These units provide clocking and act as
Frame Relay DCE interfaces on their RS-530 ports.
Each PVC has been configured for a CIR of 128 Kbps.
Created By Rajsi.Karmur

Physical Connections and Port Setup
Connect your router Serial port 0 to the appropriate interface on the Frame-
Saver switches using a DB-60 to RS-530 cable (provided by your instructor):
Router Frame Saver Port
Lab_A (FR_A) 1 1
Lab_B (FR_B) 1 2
Lab_C (FR_C) 2 1
Lab_D (FR_D) 2 2
.
Step 1 Start with a “clean” configuration (erase start and reboot).
Step 2 Set the host name to FR_x. ( x = A, B, C or D)
Step 3 Configure S0 to support Frame Relay IETF encapsulation.
Enable the interface.
Step 4 Wait about 1 minute and see if your router has received
information from the switch regarding active DLCIs. Use the
following commands and note any interesting results:
Step 5 Show frame lmi
What LMI Protocol are the switches using? (Circle one):
Cisco ITU-T Q.933a ANSI T1.617 Annex D
Step 7 Show interface s0 – Record the following
LMI enq sent ___, LMI stat recvd ___, LMI upd recvd ___, DTE LMI up
LMI enq recvd ___, LMI stat sent ___, LMI upd sent ___
LMI DLCI ___ LMI type is ___ frame relay DTE
Step 8 Try Show Frame PVC and list all known DLCIs:
________________________________________________________________
Example:
DLCI = 18, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0
Step 9 How did your router learn of these DLCIs?
_____________________________________
Created By Rajsi.Karmur

Sub-Interface Configuration
Setup DLCIs to other routers on Sub-Interfaces based on the “Frame
Relay Lab Map” using the following sequences of commands.
WARNING: Do NOT use sub-interface S0.0 – it is the “base” interface
For each Frame Relay sub-interface on your router:
Step 1 Create a sub-interface from interface configuration mode using
the int S0.1 point command. (Note: The point forces the
interface to point-to-point mode)
Step 2 Assign the frame relay DLCI o this sub-interface based on the
table for your router: frame interface-dlci xxx
Step 3 Assign the IP address to this sub-interface based on the table for
your router with a class B mask: ip address a.b.c.d 255.255.0.0
STOP! Wait for other members of your lab team to
complete their sub-interface setup before continuing
Step 4 Look at the map and note in the table below which IP Interface
addresses on other routers are directly connected via a Frame
relay connection to your router (no other routers are in between).
Step 5 Try to ping from your router to the other router’s IP addresses. If
the other end of a directly connected Frame Relay connection does
not respond, check the assigned DLCI and IP addresses carefully
on both ends.
Router Interface IP Direct? Ping OK?
FR_A 172.21.1.1
172.22.1.1
172.24.1.1
FR_B 172.21.1.2
172.23.1.2
172.25.1.2
FR_C 172.22.1.3
172.23.1.3
172.26.1.3
FR_D 172.24.1.4
172.25.1.4
172.26.1.4
Created By Rajsi.Karmur

Step 6 Try the following frame relay command and note which seem to
display any changes when you attempt to ping your neighbor:
FR-B#sho frame ?
ip show frame relay IP statistics
lapf show frame relay lapf status/statistics
lmi show frame relay lmi statistics
map Frame-Relay map table
pvc show frame relay pvc statistics
route show frame relay route
svc show frame relay SVC stuff
traffic Frame-Relay protocol statistics
Step 6 Clear the interface counters on your router (# Clear counters
serial 0) and then use your Show commands like Show Frame PVC
command. Notice that the counters may show values because of traffic since
the command executed. Monitor some counters until new values appear.
RIP Routing over Frame Relay
When all four routers can ping the other end of all of their frame relay subinterfaces,
enable RIP routing for directly connected networks.
Step 1 Enable RIP routing on all routers. Add network commands for
all directly connected interfaces. (Each router should have three
directly connected networks – For example FR_A has 172.21.1.0,
172.22.1.0 and 172.24.1.0).
Created By Rajsi.Karmur

Step 2 Monitor your “Show IP route” output as your learns of new
networks. You should learn of a total of six networks either by
direct connection or via RIP. Note one destination network that
shows two equal cost paths on the map above. Mark what you
think the two routes are.
Step 3 Try Show Frame traffic and fill in the blanks below:
Frame Relay statistics:
ARP requests sent ____, ARP replies sent ____
ARP request recvd ____, ARP replies recvd ____
Step 4 Try Show Frame IP.
Step 5 Try Show Frame LMI.
Note any changes from previous iterations.
Step 6 Try Show Frame Map. What information does this give us?
______________________________________________________
Step 7 Attempt to ping all other IP addresses on the other routers
.
Reflection:
Router Interface IP Ping successful?
FR_A 172.21.1.1
172.22.1.1
172.24.1.1
FR_B 172.21.1.2
172.23.1.2
172.25.1.2
FR_C 172.22.1.3
172.23.1.3
172.26.1.3
FR_D 172.24.1.4
172.25.1.4
172.26.1.4
Created By Rajsi.Karmur

(Optional) Add an RFC 1490 PVC to the Frame-Saver
Each Paradyne Frame-Saver is setup for a “Management” PVC on DLCI 350.
If you want to be able to send IP information TO the Frame-Saver, you can
use this PVC. For example, you can use ping to test your interface and telnet
to show status or confiruation of the Frame Saver. Only one Telnet session is
available at a time, so work in groups on router FR_A and FR_C:
FR_A has a PVC to FR_sw_12 (Frame Saver 1). IP Address is 172.20.1.12
FR_C has a PVC to FR_sw_34 (Frame Saver 2). IP Address is 172.20.1.34
Step 1 Configure another point-to-point Frame Relay PVC to the Frame-
Saver switch. Think about what you will need to do to make this
happen. Refer back to the section where you created subinterfaces
if necessary.
Step 2 Note the commands you used to setup the PVC to the
Management interface in the Frame-Saver:
__________________________________________
__________________________________________
__________________________________________
Step 3 Attempt to ping the Frame-Saver’s IP address from your router.
If you are successful, start a telnet session from your router to the
Frame-Saver.
Step 4 Have someone else telnet into your router (from FR_B or FR_D)
and observe stats as you display configuration information on the
Frame-Saver.
Reflection:
Created By Rajsi.Karmur