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.
| 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 |