Configuring OTU Port Parameters

The following example shows an OTU port configuration:

*A:ALA-A>config>port>otu# info detail
----------------------------------------------
           otu2-lan-data-rate 11.049
           sf-sd-method fec
           sf-threshold 5
           sd-threshold 7
           fec enhanced
           no report-alarm otu-ais otu-ber-sd otu-tim otu-iae otu-biae fec-sd
           no report-alarm fec-fail fec-uncorr odu-ais odu-oci odu-lck odu-bdi
           no report-alarm odu-tim opu-plm
           report-alarm loc los lof lom otu-ber-sf otu-bdi fec-sf
           sm-tti
               tx auto-generated
               expected auto-generated
               no mismatch-reaction
           exit
           pm-tti
               tx auto-generated
               expected auto-generated
               no mismatch-reaction
           exit
           psi-payload
               tx auto
               expected auto
               no mismatch-reaction
           exit
----------------------------------------------

The following example shows the show port <portId> otu detail for the default OTU configuration as shown above:

*A:ALA-A# show port 3/2/1 otu detail
 
===============================================================================
OTU Interface
===============================================================================
OTU Status         : Enabled                    FEC Mode         : enhanced
Async Mapping      : Disabled                   Data Rate        : 11.049 Gb/s
 
Cfg Alarms         : loc los lof lom otu-ber-sf otu-bdi fec-sf
Alarm Status       :
SF/SD Method       : FEC                        SF Threshold     : 1E-5
                                                SD Threshold     : 1E-7
 
SM-TTI Tx (auto)   : ALA-A:3/2/1/C44
SM-TTI Ex (bytes)  : (Not Specified)
SM-TTI Rx          : ALA-A:5/2/1/C34
OTU-TIM reaction   : none
 
PM-TTI Tx (auto)   : ALA-A:3/2/1/C44
PM-TTI Ex (bytes)  : (Not Specified)
PM-TTI Rx          : ALA-A:5/2/1/C34
ODU-TIM reaction   : none
 
PSI-PT Tx (auto)   : 0x03 (syncCbr)
PSI-PT Ex (auto)   : 0x03 (syncCbr)
PSI-PT Rx          : 0x03 (syncCbr)
OPU-PLM reaction   : none
===============================================================================
OTU Statistics
===============================================================================
Elapsed Seconds                                                10
-------------------------------------------------------------------------------
Near End Statistics                                     Count
-------------------------------------------------------------------------------
FEC Corrected 0s                                                0
FEC Corrected 1s                                                0
FEC Unrrectable Sub-rows                                        0
FEC ES                                                          0
FEC SES                                                         0
FEC UAS                                                         0
Pre-FEC BER                                             0.000E+00
Post-FEC BER                                            0.000E+00
-------------------------------------------------------------------------------
SM BIP8                                                         0
SM ES                                                           0
SM SES                                                          0
SM UAS                                                          0
SM-BIP8-BER                                             0.000E+00
-------------------------------------------------------------------------------
PM BIP8                                                         0
PM ES                                                           0
PM SES                                                          0
PM UAS                                                          0
PM-BIP8-BER                                             0.000E+00
-------------------------------------------------------------------------------
NPJ                                                             0
PPJ                                                             0
 
-------------------------------------------------------------------------------
Far End Statistics                                      Count
-------------------------------------------------------------------------------
SM BEI                                                          0
PM BEI                                                          0
===============================================================================

The window over which the Bit Error Rate (BER) determined is based on the configured threshold level. The higher the error rate the shorter the window and as the error rate decreases the window increases. Table 1 lists the configured BER thresholds and corresponding window lengths.

Table 1. Configured BER Thresholds and Window Lengths

Configured BER Threshold

Window Length

10^-3

8ms

10^-4

8ms

10^-5

8ms

10^-6

13ms

10^-7

100ms

10^-8

333ms

10^-9

1.66s