Hi,
We are having a mysterious problem with a channelized E1. I am wondering if
you have any clue. Any input would be very much appreciated.
We have been trying to commission a new 512K leased circuit but not
successful. At the central end the NTU(CSU/DSU) is connected to a
Synchronous serial port on AS5200 via X21. At the branch end the NTU is
connected to a Balanced Channelized E1 port on 3620 via G.703 RJ-45. We have
done loopback test and located the source of problem. It's between the 3620
and NTU at branch. We brought back the 120-Ohm RJ-45 cable and checked the
cable OK. And Telecom has double-checked the circuit as well. It seems that
the router is not talking to NTU at all. I have listed the router config and
the output of show controller etc. The IOS is 11.3(3).
--------------------------
controller E1 1/0
framing crc4
linecode hdb3
channel-group 0 timeslots 1-8
description Channelized E1
interface Serial1/0:0
ip address XXX.XXX.XXX.XXX 255.255.255.252
no ip mroute-cache
bandwidth 512
priority-group 1
--------------------------------
#sho controllers e1
E1 1/0 is down.
Applique type is Channelized E1 - balanced
Description: Channelized E1
Transmitter is sending remote alarm.
Receiver has loss of signal.
Framing is CRC4, Line Code is HDB3, Clock Source is Line.
Data in current interval (804 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 804 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 804 Unavail
Secs
Total Data (last 24 hours)
1 Line Code Violations, 0 Path Code Violations,
0 Slip Secs, 86254 Fr Loss Secs, 1 Line Err Secs, 0 Degraded Mins,
1 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 86254 Unavail
Secs
----------------------------------------------------
Tauranga>sho int serial 1/0:0
Serial1/0:0 is down, line protocol is down
Hardware is DSX1
Internet address is XXX.XXX.XXX.XXX/30
MTU 1500 bytes, BW 512 Kbit, DLY 20000 usec, rely 252/255, load 1/255
Encapsulation HDLC, loopback not set, keepalive set (10 sec)
Last input 02:31:00, output 02:31:00, output hang never
Last clearing of "show interface" counters 02:15:20
Input queue: 0/75/0 (size/max/drops); Total output drops: 0
Queueing strategy: priority-list 1
Output queue: high 0/20/0, medium 0/40/0, normal 0/60/0, low 0/80/0
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, 270 interface resets
0 output buffer failures, 0 output buffers swapped out
4 carrier transitions
Timeslot(s) Used:1-8, Transmitter delay is 0 flags
Regards,
Dennis
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