11-09-2007 11:27 AM - edited 03-03-2019 07:29 PM
I have a point to point t1. on either router i am getting a lot of input errors on the s0 int. Are these errros something i should be worried about?below is the show int:
Router#show int s0/0/0
Serial0/0/0 is up, line protocol is up
Hardware is GT96K with integrated T1 CSU/DSU
Description: Connection to ATLANTIC
Internet address is 172.25.6.1/30
MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec,
reliability 255/255, txload 42/255, rxload 43/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:09, output 00:00:04, output hang never
Last clearing of "show interface" counters 2w0d
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 4074
Queueing strategy: Class-based queueing
Output queue: 0/1000/64/3758 (size/max total/threshold/drops)
Conversations 0/222/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 630 kilobits/sec
2 minute input rate 261000 bits/sec, 172 packets/sec
2 minute output rate 258000 bits/sec, 165 packets/sec
142539815 packets input, 2040485932 bytes, 0 no buffer
Received 149873 broadcasts, 0 runts, 0 giants, 0 throttles
27438 input errors, 27438 CRC, 12478 frame, 5819 overrun, 0 ignored, 21471
abort
136220445 packets output, 1710436281 bytes, 0 underruns
0 output errors, 0 collisions, 42 interface resets
0 output buffer failures, 0 output buffers swapped out
8 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
11-09-2007 11:35 AM
Friend,
The interface counters have not been cleared for more than 2 weeks and there are 42 interface resets as well in addition to the input & CRC errors
Clear the counters and check whether you still see these errors. These errors are mainly due to noisy line, Bad cable or faulty equipment
Have a look at the following link for troubleshooting serial lines
http://www.cisco.com/en/US/tech/tk713/tk628/technologies_tech_note09186a00800a758d.shtml#topic5
HTH
Narayan
11-09-2007 12:04 PM
here are some of my ping outputs from one router to the other. they look way too high.
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/11/20 ms
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/19/20 ms
Success rate is 100 percent (5/5), round-trip min/avg/max = 20/20/24 ms
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/11/16 ms
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/16/24 ms
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/17/20 ms
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/14/20 ms
11-09-2007 02:06 PM
Hi,
Agrwe with Narayan, but also consider, only about 0.0002% of input packets were received with errors. That is a very small number.
Especially if the errors are not increasing anymore, it could have been due to a transient condition on the circuit, and you do not need to worry about it.
The ping times you observed are also perfectly normal and the delay variance represent the time in queue due to congestion.
Hope this helps, please rate post if it does!
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