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New Member

Reliablity goes down and lot fo inpur error and CRC errors

here iam working with 7507 router with multi-chennal e1 card. when i connect leased line to e1 port Reliablity goes down and lot fo inpur error and CRC errors. here we have sevice provier fiber termination point also.

and interface detail as follows

A4_DELHIRO>sh int s6/0/1:0

Serial6/0/1:0 is up, line protocol is up

Hardware is Multichannel E1

Internet address is 10.1.254.65/30

MTU 1500 bytes, BW 2048 Kbit, DLY 20000 usec,

reliability 245/255, txload 2/255, rxload 4/255

Encapsulation PPP, LCP Open

Open: IPCP, crc 16, Data non-inverted

Keepalive set (10 sec)

Last input 00:00:00, output 00:00:00, output hang never

Last clearing of "show interface" counters 1d03h

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 1536 kilobits/sec

5 minute input rate 37000 bits/sec, 12 packets/sec

5 minute output rate 17000 bits/sec, 19 packets/sec

412177 packets input, 104438049 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 3 giants, 0 throttles

42253 input errors, 20863 CRC, 0 frame, 0 overrun, 0 ignored, 21387 abort

685497 packets output, 204352802 bytes, 0 underruns

0 output errors, 0 collisions, 18 interface resets

0 output buffer failures, 19 output buffers swapped out

0 carrier transitions no alarm present

Timeslot(s) Used:UNFRAMED, transmit delay is 0 flags

9 REPLIES
New Member

Re: Reliablity goes down and lot fo inpur error and CRC errors

Hi

Please send the result of "Show controller" ,

have you changed the framing ?

change the framing to crc4 and no-crc4 look what will happen ?

Thanks.

New Member

Re: Reliablity goes down and lot fo inpur error and CRC errors

hi ,

i was tried both framing ie crc4 and no-crc4.

In both condition it is no working.

here iam sending sh controler log

E1 5/0/2 is down.

Applique type is Channelized E1 - balanced

Transmitter is sending remote alarm.

Receiver is getting AIS.

alarm-trigger is not set

Framing is NO-CRC4, Line Code is HDB3, Clock Source is Line.

International Bit: 1, National Bits: 11111

Data in current interval (257 seconds elapsed):

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 257 Unavail Secs

Data in Interval 1:

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 900 Unavail Secs

Data in Interval 2:

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 900 Unavail Secs

Data in Interval 3:

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 900 Unavail Secs

Data in Interval 4:

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 900 Unavail Secs

Data in Interval 5:

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 900 Unavail Secs

Data in Interval 6:

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 900 Unavail Secs

Data in Interval 7:

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 900 Unavail Secs

Data in Interval 8:

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 900 Unavail Secs

Data in Interval 9:

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 900 Unavail Secs

Data in Interval 10:

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 900 Unavail Secs

Data in Interval 11:

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 900 Unavail Secs

Data in Interval 12:

thank.

sravan kumar

Silver

Re: Reliablity goes down and lot fo inpur error and CRC errors

Can you provide the show controller of interface 6/0/1 ?

Can you ask the PTT to carry a Loopback test at the CSU/DSU ?

Hope this helps.

New Member

Re: Reliablity goes down and lot fo inpur error and CRC errors

hi,

This 6/0/1 E1 card is not used for isdn and it is for 2MB leased line terminated without CSU/DSU devices.leased line are terminated with fiber optic cable termination.

and here iam enclosing 6/0/1 sh controller status..

E1 6/0/1 is up.

Applique type is Channelized E1 - balanced

No alarms detected.

alarm-trigger is not set

Framing is UNFRAMED, Line Code is HDB3, Clock Source is Line.

Data in current interval (517 seconds elapsed):

25159 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 517 Line Err Secs, 8 Degraded Mins

517 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Data in Interval 1:

47918 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 900 Line Err Secs, 15 Degraded Mins

900 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Data in Interval 2:

49080 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 900 Line Err Secs, 15 Degraded Mins

900 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Data in Interval 3:

45115 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 900 Line Err Secs, 15 Degraded Mins

900 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Data in Interval 4:

53726 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 900 Line Err Secs, 15 Degraded Mins

900 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Data in Interval 5:

47409 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 900 Line Err Secs, 15 Degraded Mins

900 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Data in Interval 6:

41167 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 900 Line Err Secs, 15 Degraded Mins

900 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Data in Interval 7:

52526 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 900 Line Err Secs, 15 Degraded Mins

900 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Data in Interval 8:

56920 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 900 Line Err Secs, 15 Degraded Mins

900 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Data in Interval 9:

39678 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 900 Line Err Secs, 15 Degraded Mins

900 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Data in Interval 10:

sravan.

Silver

Re: Reliablity goes down and lot fo inpur error and CRC errors

The reason I ask for the screen capture of s 6/0/1 due to the original question and error are on s6/0/1....

There are many line code violations, try to check w/ PPT for the correct line code or try other types to test again.

Check below for more info.

http://www.cisco.com/en/US/tech/tk713/tk628/technologies_tech_note09186a00800f99bb.shtml

Moreover, if it is a leased line, should the channelized interface able to support it ? Do you have a 2Mbps serial interface to test it.

Hope this helps.

New Member

Re: Reliablity goes down and lot fo inpur error and CRC errors

Hi,

First of all Would like to know the exact interface you are facing problem with as you have provided different interfaces

6/0/1:0 & 5/0/2.

I would agree with jackyoung and would suggest you to test the link on 2Mbps serial interface. Also would suggest to check the connections as any loose connections can also lead to CRC.

New Member

Re: Reliablity goes down and lot fo inpur error and CRC errors

hi,

e1 controler 6/0/1:0 is configured for 2MB leased line without CSU/DSU devices ie with OFC termination.which is having lot of input error,CRC errors and low reliablity.

e1 controler 5/0/2 is configured for ISDN with framing no-crc4.whichis regularly fluctuation.and whose reliablity low and ,input errors and CRC error are very high.

for resloving this issue we have changed the Multi-chennal e1 card completely .but still the problem has not solved.

and their is no loose contact yet all..

so please help me in this regard..

sravan kumar

New Member

Re: Reliablity goes down and lot fo inpur error and CRC errors

hi all,

here iam enclosing all detail in attachment file..

sravan kumar

Silver

Re: Reliablity goes down and lot fo inpur error and CRC errors

According to the capture of s 5/0/2, there are many path code violations. Please confirm w/ PTT that the framing is correct (i.e. s 5/0/3 is using no-crc4 but s6/0/1 is using unframed). However, at s 6/0/1, it is opposite that there are many line cost violations, so please also confirm the linecode is correct and check w/ PTT for the physical line status.

Please refer to the link that provided before, it includes all symptoms from your screen capture.

If you do not clear these errors first, we can't continue the troubleshoot.

As I suggested before, if s 6/0/1 is connecting to leased line, try to use a non-multichannel serial interface (e.g. PA-8T) to test the connection and check w/ the PTT to ensure the circuit can work w/ MC interface.

Please also advise the exact model of the PA that you are using.

Hope this helps.

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