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You are here: Home / 101 CCNA LABS / Wide Area Networks Solutions / Lab 21 Solution: Verifying Cisco HDLC Encapsulation

Lab 21 Solution: Verifying Cisco HDLC Encapsulation

Task 1:

Router#config t

Enter configuration commands, one per line.  End with CNTL/Z.

Router(config)#hostname R1

R1(config)#

Router#config t

Enter configuration commands, one per line.  End with CNTL/Z.

Router(config)#hostname R2

R2(config)#

Task 2:

R1(config)#interface serial0/0

R1(config-if)#no shut

*Mar  1 00:36:47.282: %LINK-3-UPDOWN: Interface Serial0/0, changed state to down

R1(config-if)#end

R1#

R2(config)#interface serial0/0

R2(config-if)#no shut

*Mar  1 00:36:47.282: %LINK-3-UPDOWN: Interface Serial0/0, changed state to down

R2(config-if)#end

R2#

R2#show controllers serial 0/0

Interface Serial0/0

Hardware is PowerQUICC MPC860

DCE V.35, no clock

NOTE: The show controllers  command will tell you whether the interface is the DCE side (which provides the clocking) or the DTE side (which receives the clocking) on a particular router interface.

R2#conf t

Enter configuration commands, one per line.  End with CNTL/Z.

R2(config)#interface serial 0/0

R2(config-if)#clock rate 256000

R2(config-if)#end

R2#

R2#show controllers serial 0/0

Interface Serial0/0

Hardware is PowerQUICC MPC860

DCE V.35, clock rate 256000

R1#show controllers serial 0/2

Interface Serial0/0

Hardware is PowerQUICC MPC860

DTE V.35 TX and RX clocks detected.

Task 3:

R1#conf term

Enter configuration commands, one per line.  End with CNTL/Z.

R1(config)#interface s0/0

R1(config-if)#ip address 172.30.100.1 255.255.255.252

R1(config-if)#end

R1#

R2#conf t

Enter configuration commands, one per line.  End with CNTL/Z.

R2(config)#interface serial 0/0

R2(config-if)#ip address 172.30.100.2 255.255.255.252

R2(config-if)#end

R2#

R1#show interfaces serial 0/0

Serial0/0 is up, line protocol is up

Hardware is PowerQUICC Serial

Internet address is 172.30.100.1/30

MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,

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

Encapsulation HDLC, loopback not set

Keepalive set (10 sec)

R2#show interfaces serial 0/0

Serial0/0 is up, line protocol is up

Hardware is PowerQUICC Serial

Internet address is 172.30.100.2/30

MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,

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

Encapsulation HDLC, loopback not set

Keepalive set (10 sec)

Task 4:

R1#debug serial interface

Serial network interface debugging is on

*Mar  1 01:17:34.686: Serial0/0: HDLC myseq 232, mineseen 232*, yourseen 230, line up

*Mar  1 01:17:44.686: Serial0/0: HDLC myseq 233, mineseen 233*, yourseen 231, line up

*Mar  1 01:17:54.687: Serial0/0: HDLC myseq 234, mineseen 234*, yourseen 232, line up

R1#

R1#

R1#undebug all

All possible debugging has been turned off

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