From: Ron.Fuller@xxxxxx
Date: Fri May 18 2001 - 12:19:55 GMT-3
Was the circuit working previously and this is a new problem, or is this a
new install? You might want to check the clockings of the CSU/DSUs. If
this is a full T-1 then one of the CSU/DSUs will provide clocking. If it
is fractionalized, then both the of the CSU/DSUs should get their clock
from the telco. Can you loop the remote CSU/DSU? Do you have a T-1
loopback plug? Try connecting it to the cable running from the CSU/DSU to
the smartjack the telco put it and see if the line comes up. You can then
run extended pings using all 0's and all 1's as the pattern to see if
there are any cabling problems. You can do the same extended ping if the
remote loopback works on the CSU/DSUs to test the telco circuit.
Good luck!
Ron Fuller, CCIE #5851, CCDP, CCNP-ATM, CSS Level 1, CCNP-Voice, MCNE
3X Corporation
rfuller@3x.com
"Jeongwoo Park" <jpark@wams.com>
Sent by: nobody@groupstudy.com
05/18/2001 10:58 AM
Please respond to "Jeongwoo Park"
To: <ccielab@groupstudy.com>
cc:
Subject: point to point T1 troubleshooting.
Hi all
Have anyone troubleshootted T1?
it is ppp encapsulation, leased line.
LEC(local exchange carrier) said circuit is fine, which I doubt.
Router config is fine, I believe.
here is output of "sh int s2/0"
#sh int s2/0
Serial2/0 is up, line protocol is down
Hardware is M4T
Description: Leased Line to branch
Internet address is 10.10.14.86/30
MTU 1500 bytes, BW 2048 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, crc 16, loopback not set
Keepalive set (10 sec)
LCP Listen
Closed: IPCP, CDPCP
Last input never, output 00:00:03, output hang never
Last clearing of "show interface" counters 18:08:32
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 0/1/256 (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, 2368 giants, 0
throttles
8940 input errors, 1913 CRC, 0 frame, 6028
overrun, 0 ignored, 999 abort
13556 packets output, 189784 bytes, 0 underruns
0 output errors, 0 collisions, 3438 interface
resets
0 output buffer failures, 0 output buffers
swapped out
3672 carrier transitions DCD=up DSR=up
DTR=up RTS=up CTS=up
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