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.
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.
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