From: Scott, Tyson C (tyson.scott@hp.com)
Date: Wed Mar 03 2004 - 11:06:14 GMT-3
Ahmed,
First put an IP on each of the interfaces with no other
configurations. Then attempt to do loops on each of the interfaces to
see if you can get a loop to come up. If you loop it so loopback dte
under the interface configuration you should see the interface come up
as up up (looped). If you are able to do this it will help in narrowing
down the problem. If you are unable to see it come up test another
interface some of the older interfaces do not support loops even though
it may take the command.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Ahmed Mustafa
Sent: Wednesday, March 03, 2004 2:07 AM
To: ccielab@groupstudy.com
Subject: Layer 2 problem !!!
Do you guys see any problem with the below output. R2 and R3 are
connected
back to back. DCE end is attached to R2 and configured with clock rate
64000,
however I can't bring the layer 2 up. R3 keep flapping its interface up
and
down every 30-40 seconds. What is the easiest way to findout whethere
there
is a problem with the serial port itself or a problem with a cable.
Regards,
Ahmed
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-----
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Rack1R2#show int s1
Serial1 is up, line protocol is down
Hardware is HD64570
Internet address is 136.1.23.2/24
MTU 1500 bytes, BW 1544 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 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 1158 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
17 packets output, 374 bytes, 0 underruns
0 output errors, 0 collisions, 7 interface resets
0 output buffer failures, 0 output buffers swapped out
14 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
************************************************************************
*****
*************************************
Rack1R3#show int s0
Serial0 is up, line protocol is down
Hardware is HD64570
Internet address is 136.1.23.3/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:05, output 00:00:19, output hang never
Last clearing of "show interface" counters 00:01:59
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 4/1000/64/0 (size/max total/threshold/drops)
Conversations 2/2/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
12 packets input, 264 bytes, 0 no buffer
Received 12 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
9 packets output, 718 bytes, 0 underruns
0 output errors, 0 collisions, 6 interface resets
0 output buffer failures, 0 output buffers swapped out
8 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
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