15-13
Cisco ONS 15454 SDH Reference Manual, R4.6
April 2008
Chapter 15 Performance Monitoring
15.4.3 DS3i-N-12 Card Performance Monitoring Parameters
Table 15-13 VC3 Low-Order Path PM Parameters for the Near-End and Far-End
DS3i-N-12 Cards
Parameter Definition
LP-EB Low-Order Path Errored Block (LP-EB) indicates that one or more bits
are in error within a block.
LP-BBE Low-Order Path Background Block Error (LP-BBE) is an errored block
not occurring as part of an SES.
LP-ES Low-Order Path Errored Second (LP-ES) is a one-second period with one
or more errored blocks or at least one defect.
LP-SES Low-Order Path Severely Errored Seconds (LP-SES) is a one-second
period containing 30 percent or more errored blocks or at least one defect.
SES is a subset of ES.
LP-UAS Low-Order Path Unavailable Seconds (LP-UAS) is a count of the seconds
when the VC path was unavailable. A low-order path becomes unavailable
when ten consecutive seconds occur that qualify as LP-SESs, and it
continues to be unavailable until ten consecutive seconds occur that do not
qualify as LP-SESs.
LP-ESR Low-Order Path Errored Second Ratio (LP-ESR) is the ratio of errored
seconds to total seconds in available time during a fixed measurement
interval.
LP-SESR Low-Order Path Severely Errored Second Ratio (LP-SESR) is the ratio of
SES to total seconds in available time during a fixed measurement
interval.
LP-BBER Low-Order Path Background Block Error Ratio (LP-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.
Table 15-14 VC4 High-Order Path PM Parameters for the Near-End and Far-End
DS3i-N-12 Cards
Parameter Definition
HP-EB High-Order Path Errored Block (HP-EB) indicates that one or more bits
are in error within a block.
HP-BBE High-Order Path Background Block Error (HP-BBE) is an errored block
not occurring as part of an SES.
HP-ES High-Order Path Errored Second (HP-ES) is a one-second period with one
or more errored blocks or at least one defect.
HP-SES High-Order Path Severely Errored Seconds (HP-SES) is a one-second
period containing 30 percent or more errored blocks or at least one defect.
SES is a subset of ES.
HP-UAS High-Order Path Unavailable Seconds (HP-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.
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