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B3 BER errors

I have a router connected to a provider via POS and once we commissioned the link we are receiving the following logs

010091: .May 7 06:58:34.353 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface POSx/x/x, changed state to down

010092: .May 7 06:59:04.320 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface POSx/x/x, changed state to up

010093: .May 7 06:59:12.317 UTC: %ASR1000_RP_SONET_ALARM-6-SONET: ASSERT CRITICAL POSx/x/x Threshold Cross Alarm - B3

010094: .May 7 06:59:12.317 UTC: %SONET-4-ALARM: SIP0/1: POS0/1/0: B3 BER exceeds threshold, TC alert declared

 

The actual interface is configured as below.

interface POSXXX

no ip address

no ip redirects

no ip unreachables

encapsulation frame-relay IETF

load-interval 30

crc 32

pos framing sdh

pos scramble-atm

frame-relay lmi-type ansi

***** Show int pos xxx

 

POS0/1/0 is up, line protocol is up
  Hardware is SPA-1XOC12-POS
    MTU 4470 bytes, BW 622000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 4/255
  Encapsulation FRAME-RELAY IETF, crc 32, loopback not set
  Keepalive set (10 sec)
  Scramble enabled
  LMI enq sent  91221, LMI stat recvd 91208, LMI upd recvd 0, DTE LMI up
  LMI enq recvd 0, LMI stat sent  0, LMI upd sent  0
  LMI DLCI 0  LMI type is ANSI Annex D  frame relay DTE  segmentation inactive
  FR SVC disabled, LAPF state down
  Broadcast queue 0/256, broadcasts sent/dropped 0/0, interface broadcasts 0
  Last input 00:00:04, output 00:00:04, output hang never
  Last clearing of "show interface" counters 1w3d
  Input queue: 0/375/0/0 (size/max/drops/flushes); Total output drops: 371
  Queueing strategy: Class-based queueing
  Output queue: 0/40 (size/max)
  30 second input rate 11701000 bits/sec, 2647 packets/sec
  30 second output rate 3219000 bits/sec, 2218 packets/sec
     2040309131 packets input, 818819296771 bytes, 0 no buffer
     Received 0 broadcasts (0 IP multicasts)
     968195 runts, 23 giants, 0 throttles
              0 parity
     1008516 input errors, 38377 CRC, 0 frame, 0 overrun, 0 ignored, 1921 abort
     1891991396 packets output, 204838782601 bytes, 0 underruns
     0 output errors, 0 applique, 0 interface resets
     0 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out
     0 carrier transitions
 

*********************************************************************************************************************************************************

sh controllers pos 0/1/0

POS0/1/0

SECTION

  LOF = 0          LOS    = 0                            BIP(B1) = 0

LINE

  AIS = 0          RDI    = 0          FEBE = 0          BIP(B2) = 0

PATH

  AIS = 73         RDI    = 127        FEBE = 33793      BIP(B3) = 295900

  PLM = 1          UNEQ   = 0          TIM  = 0          TIU     = 0

  LOP = 0          NEWPTR = 408        PSE  = 0          NSE     = 19794119

 

Active Defects: None

Active Alarms:  None

Alarm reporting enabled for: SF SLOS SLOF B1-TCA B2-TCA PLOP B3-TCA

 

Framing: SDH

APS

 

  COAPS = 0          PSBF = 0

  State: PSBF_state = False

  Rx(K1/K2): 00/00  Tx(K1/K2): 00/00

  Rx Synchronization Status S1 = 02

  S1S0 = 02, C2 = 16

  Remote aps status (none); Reflected local aps status (none)

CLOCK RECOVERY

  RDOOL = 0

  State: RDOOL_state = False

PATH TRACE BUFFER: STABLE

  Remote hostname : v^O7kxft^Em^YNw|N^Dbue|w^VkH3^Qz^Q3j^W^F~^R

\^\D5w'

^K6^C^F^Lc^TV^DqSs^m7D^]!5

?

  Remote interface: ^Qz^Q3j^W^F~^R

\^\D5w'

^K6^C^F^Lc^TV^DqSs^m7D^]!5

?

  Remote IP addr  : w'

^K6^C^F^Lc^TV^DqSs^m7D^]!5

?

  Remote Rx(K1/K2):m/7D  Tx(K1/K2): ^]!/5

 

BER thresholds:  SF = 10e-3  SD = 10e-6

TCA thresholds:  B1 = 10e-6  B2 = 10e-6  B3 = 10e-6

 

  Clock source:  line

Question : what can be the following causes ? Is it the router POS interface which is creating in payload corruption ?

1 REPLY
Hall of Fame Super Gold

Duplicate post.   Go here:

Duplicate post.  

 

Go here:  https://supportforums.cisco.com/discussion/12220821/bit-error-rate-ber-b3-logs-filling

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