02-17-2006 08:05 PM - edited 03-03-2019 11:47 AM
I have a pair of 1721's over a p-t-p T1 with internal DSU/CSU 1T V2 cards. Telco ran end to end test with no errors. Both ends are set to ESF and B8ZS. One end has clocking set to internal and other end set to line. Telco is not providing clocking. Encapsulation is set to HDSL. Line keeps boucing up and down every minute. Telco installed Netopia routers and all works fine. I have replaced all cabling and the WIC card in both routers. What am I missing?
02-17-2006 09:22 PM
Do you know why the line is going up or down ? Is it due to errors on the line ? Can you post the output of 'show service-module serial xxx' ?
Thanks,
Paresh
02-18-2006 10:37 AM
I do not have a output of service-mod s0 at this time. Here is what "show int s0" shows...
FL7700458_R1#show int s0
Serial0 is up, line protocol is up
Hardware is PQUICC with Fractional T1 CSU/DSU
Description: To NSS Acquisition Corp. (Toyota)
Internet address is 10.244.196.138/30
MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec,
reliability 194/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:06, 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/threshold/drops)
Conversations 0/1/256 (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
525 packets input, 61669 bytes, 0 no buffer
Received 423 broadcasts, 0 runts, 0 giants, 0 throttles
60378 input errors, 3882 CRC, 53538 frame, 0 overrun, 0 ignored, 2958 abort
1338 packets output, 140891 bytes, 0 underruns
0 output errors, 0 collisions, 42 interface resets
0 output buffer failures, 0 output buffers swapped out
133 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
FL7700458_R1#
FL7700458_R1#
01:31:00: %LINK-3-UPDOWN: Interface Serial0, changed state to down
01:31:01: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0, changed state
to downshow int s0
Serial0 is down, line protocol is down
Hardware is PQUICC with Fractional T1 CSU/DSU
Description: To NSS Acquisition Corp. (Toyota)
Internet address is 10.244.196.138/30
MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec,
reliability 196/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:13, output 00:00:09, 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)
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
526 packets input, 61693 bytes, 0 no buffer
Received 424 broadcasts, 0 runts, 0 giants, 0 throttles
60528 input errors, 3950 CRC, 53620 frame, 0 overrun, 0 ignored, 2958 abort
1341 packets output, 141043 bytes, 0 underruns
0 output errors, 0 collisions, 42 interface resets
0 output buffer failures, 0 output buffers swapped out
134 carrier transitions
DCD=down DSR=up DTR=up RTS=up CTS=down
02-18-2006 02:58 PM
Thanks...you are obviously getting heaps of input errors. When you do get the output of 'show service-module', pls do post it as it should provide more information...
Paresh
02-18-2006 03:07 PM
I have the circuit cable unplugged about 24 hours now. I am not onsite to plug it back in. Here is the current host end output of "service-module".
Thanks for you help! Would it make a difference to set fdl to ansi or att?
FL16244_H1#show service-mod
Module type is T1/fractional
Hardware revision is 0.160, Software revision is 20030116,
Image checksum is 0x3F7598, Protocol revision is 0.1
Transmitter is sending remote alarm.
Receiver has loss of frame, AIS alarm,
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 17:36:08
loss of signal : 0,
loss of frame : 1, current duration 17:36:08
AIS alarm : 1, current duration 17:36:08
Remote alarm : 0,
Module access errors : 0,
Total Data (last 96 15 minute intervals):
258 Line Code Violations, 4302 Path Code Violations
217 Slip Secs, 73511 Fr Loss Secs, 4 Line Err Secs, 206 Degraded Mins
1447 Errored Secs, 1378 Bursty Err Secs, 478 Severely Err Secs, 73044 Unavai
l Secs
Data in current interval (78 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 78 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 78 Unavail Secs
02-18-2006 03:33 PM
One thing you could possibly try is to make a loopback plug so that you can loop the line at one end. Then, you can see if you are still getting errors.
Here's what I mean:
RtA ------- RtB
Connect a hardware loop plug to the line at RtB which loops the received signal to the transmit signal. Therefore, you will get an end-to-end test from RtrA and through the line. Then, repeat the process by connecting the loopback plug at the RtA end of the line...
Paresh
02-18-2006 04:22 PM
One more thing: have you tried using linecode ami ? The telco records may indicate that you are configured for bz8s but that may not necesarily be true... It's worth a shot, in any case...
Paresh
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