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Unable to change E1 line code in ASR 9K

Ahmed Alaa
Level 1
Level 1

Hello,

I'm trying to implement CEoP (circuit emulation over ip) in our network. I've STM1 from telecom side channelized to 64 E1 and using the first E1 as a test. The issue that when I try to issue show controllers in my 9K it shows the line code as B8ZS which it T1 line code. I tried to change it to HDB3 but router is refusing to change the line code.

 

 

show controllers E1 0/1/0/0/1/1/1/1
Thu Aug 20 16:18:22.808 EGY


  E1 0/1/0/0/1/1/1/1 is up
  Description: TEST  
  timeslots: 1-31
  No alarms detected.
  Control parent : TU0/1/0/0/1/1/1/1
  Framing is E1, Line Code is B8ZS, Clock Source(Configured) is line, Clock Source(Actual) is line
  National bits are 0x00.
  Data in current interval (197 seconds elapsed):
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Severely Err Framing Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
     142 Unavail Secs, 0 Stuffed Secs
     0 Near-end path failures, 0 Far-end path failures, 0 SEF/AIS Secs
  Data in Interval 1:
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Severely Err Framing Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
     550 Unavail Secs, 0 Stuffed Secs
     0 Near-end path failures, 0 Far-end path failures, 0 SEF/AIS Secs
  Data in Interval 2:
     0 Line Code Violations, 0 Path Code Violations

 

 

 

controller SONET0/1/0/0
 description test
 au 1
  width 3
  mode tug3
  tug3 1
   mode c12-e1
  !
  tug3 2
   mode c12-e1
  !
  tug3 3
   mode c12-e1
  !
 !
 clock source line
!
controller E1 0/1/0/0/1/1/1/1
 description TEST
 framing no-crc4
 cem-group framed 0 timeslots 1-31
 clock source line
 

 

 

R1(config)#controller E1 0/1/0/0/1/1/1/1
R1(config-e1)#linecode hdb3 
R1(config-e1)#commit 
Thu Aug 20 16:21:30.606 EGY

% Failed to commit one or more configuration items during a pseudo-atomic operation. All changes made have been reverted. Please issue 'show configuration failed' from this session to view the errors
R1(config-e1)#
R1(config-e1)#
R1(config-e1)#show configuration failed
Thu Aug 20 16:21:37.524 EGY
!! SEMANTIC ERRORS: This configuration was rejected by 
!! the system due to semantic errors. The individual 
!! errors with each failed configuration command can be 
!! found below.


controller E1 0/1/0/0/1/1/1/1
 linecode hdb3
!!% Invalid argument: Unsupported linecode

 

1 Reply 1

Hi Ahmed,

Which version of XR are you using? Support for E1 was added after release 4.0.0.

According to the documentation, default linecode for is AMI for E1 and B8ZS for T1, so it seems that the systems is treating your E1 controller as a T1 due to the fact that you don´t have the linecode configured under your E1 controller, in other words it is using the default.

Try to shutdown the controller and bring it up, perhaps after that the system allows you to set hdb3 as linecode.

If it still doesn´t work, you could try changing the mode under the tug3s from "c12-e1" to "e1" and see if this solve the issue.

Let me know how it goes.

Jacobo S.

 

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