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  1. Member
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    #1

    Default Connect Router to Router via DCE/DTE cable

    OK I am trying to hook 2 2501 Routers together with a DCE/DTE cable and I can't seems to get the Protocol to change to "UP" Anyone see anything wrong?

    Show Interface Serial0 on RouterA

    RouterA#show interface serial0
    Serial0 is up, line protocol is down
    Hardware is HD64570
    Internet address is 192.168.22.5/24
    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 never, output 00:00:09, 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 0/2/256 (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
    17 packets output, 664 bytes, 0 underruns
    0 output errors, 0 collisions, 20 interface resets
    0 output buffer failures, 0 output buffers swapped out
    19 carrier transitions
    DCD=up DSR=up DTR=up RTS=up CTS=up
    RouterA#

    Show IP Interface Brief

    RouterA#show ip interface brief
    Interface IP-Address OK? Method Status Protocol
    Ethernet0 192.168.2.50 YES NVRAM up up
    Serial0 192.168.22.5 YES manual up down
    Serial1 unassigned YES unset administratively down down
    RouterA#

    I can't ping it or anything.

    Thanks!
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  3. Member
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    #2
    did you set the clock rate on the DCE side?
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  4. Member
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    #3

    Default Re: Connect Router to Router via DCE/DTE cable

    Quote Originally Posted by jabb000
    OK I am trying to hook 2 2501 Routers together with a DCE/DTE cable and I can't seems to get the Protocol to change to "UP" Anyone see anything wrong?

    Show Interface Serial0 on RouterA

    RouterA#show interface serial0
    Serial0 is up, line protocol is down
    Hardware is HD64570
    Internet address is 192.168.22.5/24
    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 never, output 00:00:09, 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 0/2/256 (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
    17 packets output, 664 bytes, 0 underruns
    0 output errors, 0 collisions, 20 interface resets
    0 output buffer failures, 0 output buffers swapped out
    19 carrier transitions
    DCD=up DSR=up DTR=up RTS=up CTS=up
    RouterA#

    Show IP Interface Brief

    RouterA#show ip interface brief
    Interface IP-Address OK? Method Status Protocol
    Ethernet0 192.168.2.50 YES NVRAM up up
    Serial0 192.168.22.5 YES manual up down
    Serial1 unassigned YES unset administratively down down
    RouterA#

    I can't ping it or anything.

    Thanks!
    Since there's no circuit one of your routers must act as the DCE and provide clocking for the DTE side.
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  5. Went to the dark side.... Moderator networker050184's Avatar
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    #4
    Use the show controllers command to determine which side of the link is the DTE or DCE.
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  6. Member
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    #5

    Default Clockrate = 65000 on DCE

    Hi - I set the clockrate to 65000 on the DCE

    Thanks!
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