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Cisco ONS 15454 SDH Reference Manual, R4.6
April 2008
Chapter 15 Performance Monitoring
15.6.2 STM-1E Card Performance Monitoring Parameters
MS-NPJC-Pgen Multiplex Section Negative Pointer Justification Count, Path Generated
(MS-NPJC-Pgen) is a count of the negative pointer justifications
generated for a particular path.
Note For information about troubleshooting path protection switch counts, refer to the alarm
troubleshooting information in the Cisco ONS 15454 SDH Troubleshooting Guide.
Table 15-33 VC4 and VC4-Xc Path PM Parameters for the STM-1E Card in Far-End E4 Mode
Parameter Definition
ES Path Errored Second (ES) is a one-second period with one or more errored
blocks or at least one defect.
ESR Path Errored Second Ratio (ESR) is the ratio of errored seconds to total
seconds in available time during a fixed measurement interval.
SES Path Severely Errored Seconds (SES) is a one-second period containing
30 percent or more errored blocks or at least one defect. SES is a subset
of ES.
SESR Path Severely Errored Second Ratio (SESR) is the ratio of SES to total
seconds in available time during a fixed measurement interval.
BBE Path Background Block Error (BBE) is an errored block not occurring as
part of an SES.
BBER Path Background Block Error Ratio (BBER) is the ratio of BBE to total
blocks in available time during a fixed measurement interval. The count
of total blocks excludes all blocks during SESs.
UAS Path Unavailable Seconds (UAS) is a count of the seconds when the VC
path was unavailable. A high-order path becomes unavailable when ten
consecutive seconds occur that qualify as HP-SESs, and it continues to be
unavailable until ten consecutive seconds occur that do not qualify as
HP-SESs.
EB Path Errored Block (EB) indicates that one or more bits are in error within
a block.
Table 15-32 Near-End Pointer Justification PM Parameters for STM-1E Cards (continued)
Parameter Definition