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You are here: Home / 101 CCNA LABS / Wide Area Networks Solutions / Lab 20 Solution: Configuring back-to-back Serial connections

Lab 20 Solution: Configuring back-to-back Serial connections

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.

Task 3:

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 4:

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#

Task 5:

R1#show ip interface brief

Interface                  IP-Address      OK? Method Status   Protocol

Serial0/0                  172.30.100.1    YES manual up         up

R1#ping 172.30.100.2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 172.30.100.2, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 8/8/12 ms

R2#show  ip interface brief

Interface                  IP-Address      OK? Method Status  Protocol

Serial0/0                  172.30.100.2    YES manual up        up

R2#ping 172.30.100.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 172.30.100.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 8/8/12 ms

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