09-18-2009 10:59 PM - edited 03-04-2019 06:06 AM
For Router 2811 connected to Two Main Roters through redundant E1 links,
one of the problematic link is showing as
sh int ser0/3/0:0
MTU 1500 bytes, BW 1984 Kbit, DLY 20000 usec,
reliability 247/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Open
ACKrcvd: CDPCP
Open: IPCP, loopback not set
Keepalive set (10 sec)
Last input 00:00:01, output 00:00:01, output hang never
Last clearing of "show interface" counters 5w4d
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 0/2/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1488 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
1253026 packets input, 41299196 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
1162047252 input errors, 1162047252 CRC, 159381633 frame, 86369 overrun, 0
ignored, 158804302 abort
2116905 packets output, 278812603 bytes, 0 underruns
0 output errors, 0 collisions, 17017 interface resets
0 output buffer failures, 0 output buffers swapped out
8 carrier transitions
Timeslot(s) Used:1-31, SCC: 0, Transmitter delay is 0 flags
fine link is showing as below
Hardware is GT96K Serial
MTU 1500 bytes, BW 1984 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Open
Open: IPCP, CDPCP, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 5w4d
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 0/7/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1488 kilobits/sec
5 minute input rate 0 bits/sec, 1 packets/sec
5 minute output rate 0 bits/sec, 1 packets/sec
2731947 packets input, 316933485 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
200 input errors, 200 CRC, 126 frame, 89 overrun, 0 ignored, 79 abort
3227477 packets output, 455489904 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 output buffer failures, 0 output buffers swapped out
8 carrier transitions
Timeslot(s) Used:1-31, SCC: 1, Transmitter delay is 0 flags
what can be the problem, is there any documents for this Protocols status
09-18-2009 11:27 PM
Hello Cisco-blue,
the message PPP LCP open and IPCP open means that a successful PPP negotiation has been completed.
the message ACKrcvd: CDPCP is only related to CDPCP that is the PPP control protocol for PPP.
This can mean only side has CDP enabled but it shouldn't be a real issue.
The real troubles come when looking at the interface counters:
1253026 packets input, 41299196 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
1162047252 input errors, 1162047252 CRC, 159381633 frame, 86369 overrun, 0
ignored, 158804302 abort
the number of errors is far bigger then the number of correctly received frames.
This can be the sign of a problem in the past or during testing.
I would suggest to clear counters and to see if error counters increase over time.
to help in troubleshooting serial interfaces including E1 look at
http://www.cisco.com/en/US/docs/internetworking/troubleshooting/guide/tr1915.html
and for E1/T1
http://www.cisco.com/en/US/tech/tk713/tk628/technologies_tech_note09186a00800a758d.shtml
Hope to help
Giuseppe
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