05-21-2008 02:07 AM - edited 03-03-2019 10:01 PM
Hello,
We have a E1 line toward our ISP and this line is very unstable. Below is the syslog we get on our router:
%CONTROLLER-5-UPDOWN: Controller E1 0/2, changed state to down (AIS detected)
And below is the config on our E1 controller:
controller E1 0/2
framing NO-CRC4
channel-group 0 timeslots 1-24 speed 64
!
Please give us advices to solve the problem....
regards
Thanh
05-21-2008 02:43 AM
Thanh,
Check the framing and CRC set fron the ISP. If that is ON change turn on the framing and CRC on your side also. If that value mismatch you can notice that controller is going up and down.
Please Rate
Thanks and regards
Eldo
05-21-2008 04:23 AM
Hi Eldo, thanks for quick respons..
Bellow is the network diagram of our network so that you can understand our problem better:
RouterA:E1 <--->ISP network with E1-T1 converter<--->RouterB:T1
RouterA#sho run
controller E1 0/2
framing NO-CRC4
channel-group 0 timeslots 1-24 speed 64
!
RouterB# show run
controller T1 0/0
framing esf
linecode b8zs
channel-group 0 timeslots 1-24 speed 64
Can you verify that these config. is correct.?
Best regards
Thanh
05-21-2008 04:34 AM
Hi, AIS either means the circuit is interrupted and out of service, or the device on the other end is turned off or shutdown. All these things you have to work with the SP.
Hope this helps, please rate post if it does!
05-21-2008 04:48 AM
Hi, The ISP said that this error shoul be the time syncronization and they said that they do not provide clocking to both sides. I have tried to set master clock on E1 controller side, but no luck.
RouterA#
controller E1 0/2
framing NO-CRC4
channel-group 0 timeslots 1-24 speed 64
clock source internal
RouterB#
controller T1 0/0
framing esf
linecode b8zs
channel-group 0 timeslots 1-24 speed 64
!
Regards
Thanh
05-21-2008 05:09 AM
add the below commands and try
controller E1 0/2
linecode hdb3
clock source line and also internal.
Let us know if it helps
05-21-2008 05:29 AM
Hello Pravinxyz,
Please let me know why this will help us. We have try to "clock source internal", nut no help. Why "linecode hdb3" ? . I am affraid to do this , because it will affect the operation. The problem is the line is flapping 1 time in about 2 days..
Regards
Thanh
05-21-2008 05:43 AM
The linecode hdb3 is a dafult line code for E1.
You can check it out in show controllers command and you will find it.
Some time we miss use default and which does create some problems and issue in the configuration and depends on how ios behaves.
It was just to confurm that all the conigs are done on the interface. As above it was also siad that this could be a line problem with the isp which i totaly agree.
As you said the flapping is 1 time in about 2 days would not be a big deal for me if the downtime is in seconds and is not casueing any problems to the production network.
In case if this is causing an outage to the network then you need to get it reolved.
I would also suggest to get the line tested from both the direction with the telco. A stress test.
05-23-2008 03:30 AM
Hi Pra,
-The line code hdb3 is showed in show controllers command.
-The down time is usually quite long, about 1-2 hour. Our ISP usually says that the problems is not in their network.
-Thanh
05-21-2008 05:47 AM
One flaps time in two day is not bad. Are the serial if's up running ? Are these clean of errors ?
05-23-2008 03:36 AM
Hi,
The serial int is up and running. Below is the output data for controller/int statistics:
Router A #show controllers E1
E1 0/2 is up.
Applique type is Channelized E1 - balanced
No alarms detected.
alarm-trigger is not set
Version info Firmware: 20030807, FPGA: 11
Framing is NO-CRC4, Line Code is HDB3, Clock Source is Line.
CRC Threshold is 320. Reported from firmware is 0.
Data in current interval (536 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, 0 Unavail Secs
Total Data (last 24 hours)
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, 0 Unavail Secs
E1 0/3 is down.
Applique type is Channelized E1 - balanced
Far End Block Errors Detected
Receiver has loss of signal.
alarm-trigger is not set
Version info Firmware: 20030807, FPGA: 11
Framing is CRC4, Line Code is HDB3, Clock Source is Line.
CRC Threshold is 320. Reported from firmware is 0.
Data in current interval (542 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, 542 Unavail Secs
Total Data (last 24 hours)
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, 86400 Unavail Secs
DE-DAR-EUM1#show int
DE-DAR-EUM1#show interfaces se0/2:0
Serial0/2:0 is up, line protocol is up
Hardware is GT96K Serial
Description: US-NOAA-EUM1-DARW_MARYLD_NP1
Internet address is 192.168.93.225/30
MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 48/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:01, output hang never
Last clearing of "show interface" counters 4d00h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 3
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/16/256 (active/max active/max total)
Reserved Conversations 3/3 (allocated/max allocated)
Available Bandwidth 1072 kilobits/sec
30 second input rate 290000 bits/sec, 34 packets/sec
30 second output rate 7000 bits/sec, 9 packets/sec
5490528 packets input, 367054387 bytes, 0 no buffer
Received 38914 broadcasts, 0 runts, 0 giants, 0 throttles
7 input errors, 7 CRC, 0 frame, 0 overrun, 0 ignored, 1 abort
2445395 packets output, 227715652 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
2 carrier transitions
Timeslot(s) Used:1-24, SCC: 3, Transmitter delay is 0 flags
Router A#
-Thanh
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