08-30-2008 12:05 PM - edited 03-06-2019 01:05 AM
Hello Guys,
I have configued two T1 dsu/csu card on two Ciso 3640.Back-to-back for my lab. I used RJ45 crossover cable between them. Both cards are in alarm(AL) what protocol or permeter that I am missing to make both routers talk to each other? See beloow and advised.
Router1
serial 2/0
ip address 10.10.11.2 255.255.255.0
service-module t1 clock source line
service-module t1 data-coding normal
service-module t1 timeslots all speed 64
service-module t1 framing esf
service-module t1 lbo none
service-module t1 linecode b8zs
no service-module t1 remote-alarm-enable
no service-module t1 fdl
encapsulation frame-relay
frame-relay lmi-type cisco
frame-relay interface-dlci 105
Router2
serial 2/0
ip address 10.10.11.1 255.255.255.0
service-module t1 clock source internal
service-module t1 data-coding normal
service-module t1 timeslots all speed 64
service-module t1 framing esf
service-module t1 lbo none
service-module t1 linecode b8zs
no service-module t1 remote-alarm-enable
no service-module t1 fdl
encapsulation frame-relay
frame-relay lmi-type cisco
frame-relay interface-dlci 501
Thx,
Eric
08-30-2008 12:30 PM
Eric,
I don't think you can use a regular crossover cable for back to back T-1's. You will want to buy or make a custom T-1 crossover cable for your lab.
A t1 crossover is pinned this way:
1 -> 4
2 -> 5
4 -> 1
5 -> 2
http://www.cisco.com/en/US/products/hw/routers/ps233/products_tech_note09186a00800a3f09.shtml#topic2
HTH,
Mark
08-30-2008 03:44 PM
Thanks Mark! I'll check with my local stores or make custom T-1 by following your example.
Thx,
Eric
08-30-2008 07:02 PM
Thanks Mark, I made custom crossover cable and got Both DSU/CSU CD led light are green but no link between both routers. Any idea >>add or remove?
Serial2/0 is down, line protocol is down
Hardware is QUICC with integrated T1 CSU/DSU
Internet address is 10.10.10.2/24
MTU 1500 bytes, BW 1536 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 00:07:19
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 0/0/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1152 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, 1 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=down DSR=up DTR=up RTS=up CTS=down
@@@@@@@@@@@@@
Serial2/0 is down, line protocol is down
Hardware is QUICC with integrated T1 CSU/DSU
Internet address is 10.10.10.1/24
MTU 1500 bytes, BW 1536 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 00:17:25
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 0/0/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1152 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, 1 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=down DSR=up DTR=up RTS=up CTS=down
08-31-2008 06:22 AM
I have pin out cable correctly CD led light is up and change the serial int to encap PPP but still no link between them. This is driving me crazy as I could not resolute this issue. Any idea??
ATM#sh service-module
Interface Serial2/0
Module type is T1/fractional
Hardware revision is 0.128, Software revision is 20050811-0.3,
Image checksum is 0x80ACD1B3, Protocol revision is 0.1
Transmitter is sending remote alarm.
Receiver has no alarms.
Framing is ESF, Line Code is B8ZS, Current clock source is line,
Fraction has 24 timeslots (64 Kbits/sec each), Net bandwidth is 1536 Kbits/sec.
Last module self-test (done at startup): Passed
Last clearing of alarm counters 01:29:19
loss of signal : 0,
loss of frame : 0,
AIS alarm : 0,
Remote alarm : 0,
Module access errors : 0,
Total Data (last 0 15 minute intervals):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Data in current interval (0 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Interface Serial2/1
Module type is T1/fractional
Hardware revision is 0.80, Software revision is 20050811-0.3,
Image checksum is 0x80ACD1B3, Protocol revision is 0.1
Transmitter is sending remote alarm.
Receiver has loss of signal, loss of frame,
Framing is ESF, Line Code is B8ZS, Current clock source is line,
Fraction has 24 timeslots (64 Kbits/sec each), Net bandwidth is 1536 Kbits/sec.
Last module self-test (done at startup): Passed
Last clearing of alarm counters 01:29:27
loss of signal : 1, current duration 01:29:15
loss of frame : 1, current duration 01:29:15
AIS alarm : 0,
Remote alarm : 0,
Module access errors : 0,
Total Data (last 0 15 minute intervals):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Data in current interval (0 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
08-31-2008 06:32 PM
I got it resolved after try and errors procedures on both routers. Make clocking source line on both end do not make other end internal that was my problem. If you fellow below config yours will work fine. Thank you all for your help and advised.
encapsulation hdlc
bandwidth 1544
service-module t1 clock source line
service-module t1 data-coding normal
service-module t1 timeslots all speed 64
service-module t1 framing esf
service-module t1 lbo none
service-module t1 linecode b8zs
no service-module t1 remote-alarm-enable
no service-module t1 fdl
********************
****A t1 crossover is pinned this way:
1 -> 4
2 -> 5
4 -> 1
5 -> 2
********
Cheers,
Eric
08-31-2008 02:56 PM
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide