Step 1: Connect the PCs to the router console ports

a. Referring to the topology diagram, connect a console cable from PC1 to the console port on R1.

Connect a console cable from PC2 to the console port on R2.

b. Apply power to all PCs and routers.

c. Open a HyperTerminal session on each PC and establish a session to the respective router.

Step 2: Configure the serial interface on R1

Within the global configuration mode of R1, enter the following commands:

Router(config)#hostname Router1

Router1(config)#interface serial 0/1/0

Router1(config-if)#ip address 192.168.1.1 255.255.255.0

Router1(config-if)#no shutdown

Router1(config-if)#end

Router1#

Step 3: Configure the serial interface on R2

Within the global configuration mode of R2, enter the following commands:

Router(config)#hostname Router2

Router2(config)#interface serial 0/1/1

Router2(config-if)#ip address 192.168.1.2 255.255.255.0

Router2(config-if)#clock rate 56000

Router2(config-if)#no shutdown

Router2(config-if)#end

Router2#

Step 4: View the show interface output

a. On Router1, issue the show interface serial 0/1/0 command from the privileged EXEC

mode to view the encapsulation type.

Router1#show interface serial 0/1/0

Serial0/1/0 is up, line protocol is up

Hardware is GT96K Serial

Internet address is 192.168.1.1/24

MTU 1500 bytes, BW 128 Kbit, DLY 20000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation HDLC, loopback not set

Keepalive set (10 sec)

Last input 00:00:09, output 00:00:08, output hang never

Last clearing of “show interface” counters 00:19:54

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: fifo

Output queue: 0/40 (size/max)

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

14 packets input, 980 bytes, 0 no buffer

Received 9 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

14 packets output, 1026 bytes, 0 underruns

0 output errors, 0 collisions, 8 interface resets

0 output buffer failures, 0 output buffers swapped out

0 carrier transitions

DCD=up DSR=down DTR=up RTS=up CTS=up

What is the encapsulation type? ____________________ HDLC

b. On Router2, issue the show interface serial 0/1/1 command from the privileged EXEC

mode to view the encapsulation type.

Router2#show interface serial 0/1/1

Serial0/1/1 is up, line protocol is up

Hardware is HD64570

Internet address is 192.168.1.2/24

MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255

Encapsulation HDLC, loopback not set, keepalive set (10 sec)

Last input 00:00:05, output 00:00:06, output hang never

Last clearing of “show interface” counters never

Queueing strategy: fifo

Output queue 0/40, 0 drops; input queue 0/75, 0 drops

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

9 packets input, 616 bytes, 0 no buffer

Received 4 broadcasts, 0 runts, 0 giants, 0 throttles

2673 input errors, 2673 CRC, 0 frame, 0 overrun, 0 ignored, 1 abort

101 packets output, 4001 bytes, 0 underruns

0 output errors, 0 collisions, 43 interface resets

0 output buffer failures, 0 output buffers swapped out

5 carrier transitions

DCD=up DSR=up DTR=up RTS=up CTS=up

What is the encapsulation type? ____________________ HDLC

Step 5: Test router connectivity

From Router2, ping Router1 to test connectivity.

Router2#ping 192.168.1.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 32/32/36 ms

If the ping is unsuccessful, troubleshoot the routers until connectivity is attained.

Step 6: Change the encapsulation type to PPP

From the privileged EXEC mode, issue the following commands to change the encapsulation type on the

connecting serial interfaces of both routers to PPP.

Router1#config terminal

Router1(config)#interface serial 0/1/0

Router1(config-if)#encapsulation ppp

Router1(config-if)#end

Router1#

Router2#config terminal

Router2(config)#interface serial 0/1/1

Router2(config-if)#encapsulation ppp

Router2(config-if)#end

Router2#

Step 7: View the show interface output

a. On Router1, issue the show interface serial 0/1/0 command from the privileged EXEC

mode to view the encapsulation type.

Router1#show interface serial 0/1/0

Serial0/1/0 is up, line protocol is up

Hardware is GT96K Serial

Internet address is 192.168.1.1/24

MTU 1500 bytes, BW 128 Kbit, DLY 20000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation PPP, LCP Open

Open: IPCP, CDPCP, loopback not set

Keepalive set (10 sec)

Last input 00:00:18, output 00:00:03, output hang never

Last clearing of “show interface” counters 00:01:49

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: fifo

Output queue: 0/40 (size/max)

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

31 packets input, 1837 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

40 packets output, 2960 bytes, 0 underruns

0 output errors, 0 collisions, 2 interface resets

0 output buffer failures, 0 output buffers swapped out

8 carrier transitions

DCD=up DSR=down DTR=up RTS=up CTS=up

b. On Router2, issue the show interface serial 0/1/1 command from privileged EXEC mode to

view the encapsulation type.

Router2#show interface serial 0/1/1

Serial0/1/1 is up, line protocol is up

Hardware is HD64570

Internet address is 192.168.1.2/24

MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load

1/255

Encapsulation PPP, loopback not set, keepalive set (10 sec)

LCP Open

Open: IPCP, CDPCP

Last input 00:00:01, output 00:00:01, output hang never

Last clearing of “show interface” counters never

Queueing strategy: fifo

Output queue 0/40, 0 drops; input queue 0/75, 0 drops

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

54 packets input, 4042 bytes, 0 no buffer

Received 28 broadcasts, 0 runts, 0 giants, 0 throttles

2673 input errors, 2673 CRC, 0 frame, 0 overrun, 0 ignored, 1 abort

137 packets output, 6252 bytes, 0 underruns

0 output errors, 0 collisions, 47 interface resets

0 output buffer failures, 0 output buffers swapped out

5 carrier transitions

DCD=up DSR=up DTR=up RTS=up CTS=up

Can the serial interface on Router2 be pinged from Router1? __________ Ya

Can the serial interface on Router1 be pinged from Router2? __________ Ya

If the answer is no for either question, troubleshoot the router configurations to find the error.

Then issue the pings again until the answer to both questions is yes.

Step 8: Configure PPP authentication on R1 with CHAP

a. Configure the CHAP username and password on the R1 router. The username must be identical to

the hostname of the other router. Both the password and usernames are case-sensitive. Define the

username and password to expect from the remote router. On Cisco routers, the secret password

must be the same for both routers.

Router1(config)#username Router2 password cisco

Router1(config)#interface serial 0/1/0

Router1(config-if)#ppp authentication chap

Router1(config-if)#end

Router1#

Step 9: Configure PPP authentication on R2 with CHAP

a. Configure the CHAP username and password on the R2 router. The passwords must be the

same on both routers. The username must be identical to the hostname on the other router. Both

the password and user names are case-sensitive. Define the username and password to expect

from the remote router.

Router2(config)#username Router1 password cisco

Router2(config)#interface serial 0/1/1

Router2(config-if)#ppp authentication chap

Router2(config-if)#end

Router2#

Step 10: Verify that the serial connection is functioning

Verify that the serial connection is functioning by pinging the serial interface of R1.

Was it successful? __________ yes

Router2#ping 192.168.1.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms

Why or why not?

Kedua router menggunakan PPP dengan CHAP dan username yang sesuai dan password diatur pada kedua router.

Step 12: Clean up

a. Erase the configurations and reload the routers.

b. Disconnect and store the cabling.

c. For PC hosts that are normally connected to other networks (such as the school LAN or to the

Internet), reconnect the appropriate cabling and restore the TCP/IP settings.