Datasheet

Lab – Configuring Basic PPP with Authentication

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

1003 packets input, 78348 bytes, 0 no buffer

Received 527 broadcasts (0 IP multicasts)

0 runts, 0 giants, 0 throttles

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

1090 packets output, 80262 bytes, 0 underruns

0 output errors, 0 collisions, 3 interface resets

0 unknown protocol drops

0 output buffer failures, 0 output buffers swapped out

2 carrier transitions

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

What is the default serial encapsulation for a Cisco router? __________________________________ HDLC

Step 2: Change the serial encapsulation to PPP.

a. Issue the encapsulation ppp command on the S0/0/0 interface for the Branch1 router to change the

encapsulation from HDLC to PPP.

Branch1(config)# interface s0/0/0

Branch1(config-if)# encapsulation ppp

Branch1(config-if)#

Jun 19 06:02:33.687: %OSPF-5-ADJCHG: Process 1, Nbr 209.165.200.225 on Serial0/0/0

from FULL to DOWN, Neighbor Down: Interface down or detached

Branch1(config-if)#

Jun 19 06:02:35.687: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0,

changed state to down

b. Issue the command to display the line status and line protocol for interface S0/0/0 on the Branch1 router.

Document the command issued. What is current interface status for S0/0/0?

____________________________________________________________________________________

Branch1# show ip interface brief

Line status is up, and line protocol is down.

Branch1# show ip interface brief

Interface IP-Address OK? Method Status Protocol

Embedded-Service-Engine0/0 unassigned YES unset administratively down down

GigabitEthernet0/0 unassigned YES unset administratively down down

GigabitEthernet0/1 192.168.1.1 YES manual up up

Serial0/0/0 10.1.1.1 YES manual up down

Serial0/0/1 unassigned YES unset administratively down down

c. Issue the encapsulation ppp command on interface S0/0/0 for the Central router to correct the serial

encapsulation mismatch.

Central(config)# interface s0/0/0

Central(config-if)# encapsulation ppp

Central(config-if)#

.Jun 19 06:03:41.186: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0,

changed state to up

.Jun 19 06:03:41.274: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.1.1 on Serial0/0/0 from

LOADING to FULL, Loading Done