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Cisco ONS 15454 SDH Reference Manual, R4.6
April 2008
Chapter 15 Performance Monitoring
15.6.1 STM-1 Cards Performance Monitoring Parameters
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.
HP-ESR High-Order Path Errored Second Ratio (HP-ESR) is the ratio of errored
seconds to total seconds in available time during a fixed measurement
interval.
HP-SESR High-Order Path Severely Errored Second Ratio (HP-SESR) is the ratio
of SES to total seconds in available time during a fixed measurement
interval.
HP-BBER High-Order Path Background Block Error Ratio (HP-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 15-28 High-Order VC4 and VC4-Xc Path PM Parameters for the Far-End
STM1 SH 1310-8 Cards
Parameter Definition
Note Far-end high-order VC4 and VC4-Xc path PM parameters do not apply to the STM1-4 card.
Note SDH path PM parameters do not increment unless IPPM is enabled. See the
“15.2 Intermediate-Path Performance Monitoring” section on page 15-2.
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.
HP-ESR High-Order Path Errored Second Ratio (HP-ESR) is the ratio of errored
seconds to total seconds in available time during a fixed measurement
interval.
Table 15-27 High-Order VC4 and VC4-Xc Path PM Parameters for the Near-End
STM-1 and STM1 SH 1310-8 Cards (continued)
Parameter Definition