Line Protocol is down (Cisco Packet Tracer)

[vinsanity02]

Hi all,

The line protocol is still down. I already did a "no shutdown" command on serial 2/0 interface of the router. I can't ping to the IP address on the serial interface. I'm using Cisco Packet Tracer 5.3.1

Router3#show ip int brief
Interface              IP-Address      OK? Method Status                Protocol

FastEthernet0/0        192.168.3.1     YES manual up                    up

FastEthernet1/0        unassigned      YES unset  administratively down down

Serial2/0                  192.168.2.2      YES manual up                    down

Serial3/0                   unassigned      YES unset  administratively down down

FastEthernet4/0        unassigned      YES unset  administratively down down

FastEthernet5/0        unassigned      YES unset  administratively down down

--------------------------------

Any explainations will be much appreciated.

-alvin

[vinsanity02]

Router3#show interfaces serial 2/0

Serial2/0 is up, line protocol is down (disabled)

  Hardware is HD64570

  Internet address is 192.168.2.2/24

  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 never, output never, output hang never

  Last clearing of "show interface" counters never

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

  Queueing strategy: weighted fair

  Output queue: 0/1000/64/0 (size/max total/threshold/drops)

     Conversations  0/0/256 (active/max active/max total)

     Reserved Conversations 0/0 (allocated/max allocated)

     Available Bandwidth 96 kilobits/sec

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

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

     0 packets input, 0 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

     0 packets output, 0 bytes, 0 underruns

     0 output errors, 0 collisions, 0 interface resets

     0 output buffer failures, 0 output buffers swapped out

     0 carrier transitions

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

[vinsanity02]

Router3#show run
Building configuration...

Current configuration : 788 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router3
!
!
enable secret 5 $1$mERr$hx5rVt7rPNoS4wqbXKX7m0
!
!
interface FastEthernet0/0
ip address 192.168.3.1 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet1/0
no ip address
duplex auto
speed auto
shutdown
!
interface Serial2/0
ip address 192.168.2.2 255.255.255.0
!
interface Serial3/0
no ip address
shutdown
!
interface FastEthernet4/0
no ip address
shutdown
!
interface FastEthernet5/0
no ip address
shutdown
!
router rip
version 2
network 192.168.2.0
network 192.168.3.0
!
ip classless
!
!
line con 0
password cisco
login
line vty 0 4
password cisco
login
!
!
end

[Latchum Naidu · Accepted solution]

Hi,

You need to make sure the speed, duplex, and clock rate settings are same at both ends.

Please click on the correct answer on all posts if they answered your question.
Regards,
Naidu.

[vinsanity02]

I only see clock rate settings on serial interface of the router. I don't see duplex and speed.

I have read from the Packet Tracer manual that I must enable clocking on the DCE side to bring up the line protocol.

How do we enable clocking on the DCE side?

pls help..

[Prathamesh Thorat]

Thanks, Now it is working fine. I had got same issue.

[elilois]

hello, I have the same issue please what did you do

[glen.grant]

   You haven't provided any info on how the device on the other end of the serial line is configured .  Hard to tell anything from this..

[Latchum Naidu · Accepted solution]

Hi,

If you connected a DCE cable to an interface, then no matter what, that interface must provide clocking and in turn be of type DCE.

See the below. Interface Ser0/0/0 is connected to a DCE cable, therefore provides clocking and is defined as type DCE.

interface Serial0/0/0
encapsulation frame-relay
clock rate 2000000
frame-relay intf-type dce

See the below link for more information.
http://www.ee.buu.ac.th/~acitl/project/2010/CISCO/Help_of_Packettracer/connectionsLinks.htm

Please click on the correct answer on all posts if they answered your question.
Regards,
Naidu.

[vinsanity02]

two routers are connected to serial interfaces. I have configured the DCE and DTE clock rate already and the line protocol is now UP.

also in the other router connected to a cloud, I followed your frame-relay commands and the line protocol is now UP.

THANKS A LOT..

[Latchum Naidu · Accepted solution]

Hi,

I am so glad to see that your problem has resolved with my suggestions.
And thanks for your rating.

Please click on the correct answer on all posts if they answered your question.
Regards,
Naidu.