CCNA WAN Protocols Lab Scenario

Date of Issue: 07-01-2000 CCNA WAN Protocols Lab Scenario by Dale Holmes Introduction Set-up Items Solution Configuring the Physical Connectivity Configuring the Frame Relay Switching

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Date of Issue: 07-01-2000

CCNA WAN Protocols Lab Scenario

by Dale Holmes

Introduction

Set-up Items

Solution

Configuring the Physical Connectivity

Configuring the Frame Relay Switching Function

Configuring the Frame Relay Access Routers

Testing Connectivity

Introduction

You are the systems administrator for your company, Happy Acres Growers, Inc Throughout your tenure with the company, you have expressed your interest in the data communications side of the IT house You often queried the manager of network services for any openings in the department, and tried to show the knowledge that you have gained through self-study After many months of effort, you hear opportunity knocking

The company is planning to implement a Frame Relay hub-and-spoke network connecting all of its growers' sites to the corporate headquarters The network manager feels that his department has too many projects to spare any time for this one He will need to hire an additional engineer You have been offered an opportunity to move from your systems position into a slot on the network team, if you can demonstrate to the network manager that you have an understanding of Frame Relay concepts and the ability to configure Cisco routers for Frame Relay connections You decide to set up a home lab and get some practice before your meeting with the network manager

The first thing you need to do is create a basic Frame Relay network using your 3 Cisco 2501 access routers The routers have host names of R1, R2, and R3 Here is what you decide to do:

Set-up Items

1 Connect each of the routers with back-to-back cables

2 Configure router R2 to act as a Frame Relay switch

3 Configure the Frame Relay switch to advertise DLCI 102 on interface s0 and 201 on interface s1, and to route frames between the two interfaces

This is the Lab Scenario for the second edition

of the CertificationZone CCNA WAN Protocols

Issue

There is an additional Lab Scenario on the

subject See the 1999-12 CCNA Lab Scenario

on Wan Protocols

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4 Configure the remaining two routers for Frame Relay connections Allow them to use Inverse ARP to detect the DLCIs

5 Configure an IP address of 10.10.10.1/24 on R1 and 10.10.10.2/24 on R3

6 Verify connectivity across the Frame Relay link using the ping command

7 Examine Frame Relay LMI activity on router R1

8 Examine the state of the PVCs on each R1 and on R2

Solution

Configuring the Physical Connectivity

a Connect the DTE end of a Cisco back-to-back cable to the

s0 interface of R1

b Connect the other end of this cable to the s0 interface of

R2

c Connect the DTE end of another back-to-back cable to the

s1 interface of R2

d Connect the other end of the cable to the s0 interface of R3

Configuring the Frame Relay Switching Function

(Set-up item 2)

Configure R2 to act as a Frame Relay switch Follow these steps:

a login to the router, and enter Privileged Exec mode

R2>enable

password:*******

R2#

b Enter Global Configuration mode

R2#conf t

c Enable Frame Relay switching

R2(config)#frame-relay switching

d Configure each interface for Frame Relay encapsulation

R2(config)#int s0

R2(config-if)#encapsulation frame-relay

R2(config-if)#int s1

e Configure the router to provide a clockrate of 56 Kbps

R2(config-if)#clockrate 56000

f Configure the LMI type on each serial interface

You can tell if a DTE or a DCE plug is inserted

into a given serial interface with the show

controller serial x where x is the interface

number Another way to tell if a DCE plug is connected is that only DCE interfaces will

accept a clockrate command clockrate and

bandwidth are independent commands, can

have different values, and appear both on DTE and DCE interfaces

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R2(config-if)#frame-relay lmi-type ansi

g Configure each serial interface to act as DCE

R2(config-if)#frame-relay intf-type dce

(Set-up item 3)

h Configure each serial interface to route incoming frames to the

other serial interface

R2(config-if)#frame-relay route 201 interface Serial0 102

R2(config-if)#frame-relay route 102 interface Serial1 201

Configuring the Frame Relay Access Routers

(Set-up items 4 and 5)

Configure R1 for Frame Relay operation Follow the steps below:

a Enter Interface Configuration mode for R1's interface s0

Configure Frame Relay encapsulation

b Configure the LMI type

c Assign IP addresses to the s0 interfaces on routers R1

R1(config-if)#ip address 10.10.10.1 255.255.255.0

d Enter Interface Configuration mode for R3's interface s0 Configure Frame Relay encapsulation

e Configure the LMI type

f Assign IP addresses to the s0 interfaces on router R3

R3(config-if)#ip address 10.10.10.2 255.255.255.0

Testing Connectivity

(Set-up item 6)

Save your configs on each router, then test for connectivity across the Frame Relay link using the ping command

Extra Credit Challenge

How can you repeat the command with the least amount of typing?

Answer: Use the up arrow to repeat commands

Tip

You've done quite a bit of configuration An intermediate "save" here would be

conservative practice

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a Save configs using the copy running-configuration

startup-configuration command on each router:

R1#copy run start

R2#copy run start

R3#copy run start

b Test for connectivity across the Frame Relay link using the ping

command on routers R1 and R3

R1#ping 10.10.10.2

Type escape sequence to abort

Sending 5, 100-byte ICMP Echos to 10.10.10.2,

timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5),

round-trip min/avg/max = 64/67/68 ms

R3#ping 10.10.10.1

Type escape sequence to abort

Sending 5, 100-byte ICMP Echos to 10.10.10.1,

timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5),

round-trip min/avg/max = 64/67/68 ms

(Set-up item 7)

Examine the LMI activity on R1

a Examine the output of the following command:

R1#debug frame-relay lmi

Frame Relay LMI debugging is on

Displaying all Frame Relay LMI data

R1#

00:19:57: Serial0(out): StEnq, myseq 88, yourseen 87, DTE up

00:19:57: datagramstart = 0xE30BD8, datagramsize = 14

00:19:57: FR encap = 0x00010308

00:19:57: 00 75 95 01 01 01 03 02 58 57

00:19:57:

00:19:57: Serial0(in): Status, myseq 88

00:19:57: RT IE 1, length 1, type 1

00:19:57: KA IE 3, length 2, yourseq 88, myseq 88

00:20:07: Serial0(out): StEnq, myseq 89, yourseen 88, DTE up

00:20:07: datagramstart = 0xE30BD8, datagramsize = 14

00:20:07: FR encap = 0x00010308

00:20:07: 00 75 95 01 01 01 03 02 59 58

00:20:07:

b Turn off debugging with the undebug all command:

R1#u al

All possible debugging has been turned off

c Use the show frame-relay lmi command on R1.

R1#show frame-relay lmi

LMI Statistics for interface Serial0

(Frame Relay DTE) LMI TYPE = ANSI

Invalid Unnumbered info 0 Invalid Prot Disc 0

Note:

write memory is an earlier name for the same

command as copy run start, but Cisco has said it will eventually drop support for write

mem You might find a very old IOS version

that only accepts write mem.

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Invalid dummy Call Ref 0 Invalid Msg Type 0

Invalid Status Message 0 Invalid Lock Shift 0

Invalid Information ID 0 Invalid Report IE Len 0

Invalid Report Request 0 Invalid Keep IE Len 0

Num Status Enq Sent 106 Num Status msgs Rcvd 106

Num Update Status Rcvd 0 Num Status Timeouts 1

(Set-up item 8)

Examine the state of the Frame Relay PVCs on router R1 and R2

R1#show frame-relay pvc

PVC Statistics for interface Serial0 (Frame Relay DTE)

Active Inactive Deleted Static

Local 1 0 0 0

Switched 0 0 0 0

Unused 0 0 0 0

DLCI = 102, DLCI USAGE = LOCAL,

PVC STATUS = ACTIVE, INTERFACE = Serial0

input pkts 11 output pkts 12 in bytes 1074

out bytes 1108 dropped pkts 0 in FECN pkts 0

in BECN pkts 0 out FECN pkts 0 out BECN pkts 0

in DE pkts 0 out DE pkts 0

out bcast pkts 2 out bcast bytes 68

pvc create time 00:15:09,

last time pvc status changed 00:08:09

R2#show frame-relay pvc

PVC Statistics for interface Serial0 (Frame Relay DCE)

Local 0 0 0 0

Switched 1 0 0 0

Unused 0 0 0 0

DLCI = 102, DLCI USAGE = SWITCHED,

out bcast pkts 0 out bcast bytes 0 Num Pkts Switched 13

PVC Statistics for interface Serial1 (Frame Relay DCE)

Local 0 0 0 0

Switched 1 0 0 0

Unused 0 0 0 0

DLCI = 201, DLCI USAGE = SWITCHED,

out bcast pkts 0 out bcast bytes 0 Num Pkts Switched 12

[NA-WANP-LS2-F03]

[2000-06-28-01]

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Tiêu đề	CCNA WAN Protocols Lab Scenario
Tác giả	Dale Holmes
Trường học	CertificationZone
Chuyên ngành	Networking
Thể loại	Bài tập thực hành
Năm xuất bản	2000
Thành phố	Unknown

Định dạng
Số trang	6
Dung lượng	33,44 KB