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Community Member

Serial cable connection

I try to connect two Cisco 2504 router together with DCE-DTE cable at serial 0 at both side. However, it is not work, when i try to use serial 0 and serial 1 at each side. it works again.

What is the problem ?

9 REPLIES

Re: Serial cable connection

Can you configure "clock rate" on the DCE side and see if that helps ?

Community Member

Re: Serial cable connection

i try to configure the clock rate at DCE side and it is still not work

Re: Serial cable connection

I have a couple of questions:

1) Is the S0 in working condition?

2) Are the ports in "no shut" state ?

Re: Serial cable connection

In addition to that can you check whether you have the command 'frame-relay intf-type dce' on the DCE interface.

HTH

Sundar

Community Member

Re: Serial cable connection

all the setting as following

ip address

subnet mask

working condition

all both two port have setting probaly

however, when i use s0 to s1 with same setting it works not in s0 to s0

Re: Serial cable connection

can you post the configs on both ends when you are using s0 and s0 AND so and s1.

Re: Serial cable connection

What do you mean by working condition. Is in the interface in up/down state. What is the status of the interface signals, DCD/DTR etc. Can you post the relevant configuration?

HTH

Sundar

Community Member

Re: Serial cable connection

2501>show int s0

Hardware is HD64570

Internet address is 192.168.1.2/24

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)

Last input never, output 00:00:06, output hang never

Last clearing of "show interface" counters never

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

Queueing strategy: weighted fair

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

Conversations 0/1/256 (active/max active/max total)

Reserved Conversations 0/0 (allocated/max allocated)

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

29 packets output, 638 bytes, 0 underruns

0 output errors, 0 collisions, 11 interface resets

0 output buffer failures, 0 output buffers swapped out

33 carrier transitions

Serial0 is up, line protocol is down

Hardware is HD64570

Internet address is 192.168.1.10/24

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 00:00:09, output 00:00:00, output hang never

Last clearing of "show interface" counters never

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

Queueing strategy: weighted fair

Output queue: 0/1000/64/0 (size/max total/threshol

00:11:28: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0, changed state

to downd/drops)

Conversations 0/1/256 (active/max active/max total)

Reserved Conversations 0/0 (allocated/max allocated)

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

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

40 packets input, 880 bytes, 0 no buffer

Received 40 broadcasts, 0 runts, 0 giants, 0 throttles

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

104 packets output, 14034 bytes, 0 underruns

0 output errors, 0 collisions, 26 interface resets

0 output buffer failures, 0 output buffers swapped out

28 carrier transitions

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

Re: Serial cable connection

It would be easy to troubleshoot if you can provide more info.

Could you post the

1) "sh run" for interfaces s0 and s1 on both the routers you are connecting?

2) "sh interface" for s0 and s1 for both the routers

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