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Cisco ONS 15600 SDH Reference Manual, Release 9.0
78-18400-01
Chapter 12 Performance Monitoring
12.4 Performance-Monitoring Parameter Definitions
MS-ESR
Multiplex Section Errored Second Ratio (MS-ESR) is the ratio of errored seconds to
total seconds in available time during a fixed measurement interval.
MS-SESR
Multiplex Section Severely Errored Second ratio (MS-SESR) is the ratio of SES to
total seconds in available time during a fixed measurement interval.
MS-BBER
Multiplex Section Background Block Error Ratio (MS-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.
MS-PSC-W
For a working line in a 2-fiber MS-SPRing, Multiplex Section Protection Switching
Count-Working (MS-PSC-W) is a count of the number of times traffic switches away
from the working capacity in the failed line and back to the working capacity after
the failure is cleared. MS-PSC-W increments on the failed working line and MS-PSC
increments on the active protect line. For a working line in a 4-fiber MS-SPRing,
MS-PSC-W is a count of the number of times service switches from a working line
to a protection line plus the number of times it switches back to the working line.
MS-PSC-W increments on the failed line and MS-PSC-R or MS-PSC-S increments
on the active protect line.
MS-PSD-W
For a working line in a two-fiber MS-SPRing, Multiplex Section Protection
Switching Duration-Working (MS-PSD-W) is a count of the number of seconds that
service was carried on the protection line. MS-PSD-W increments on the failed
working line and MS-PSD increments on the active protect line.
HP-EB
High-Order Path Errored Block (HP-EB) indicates that one or more bits are in error
within a block.
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-BBE
High-Order Path Background Block Error (HP-BBE) is an errored block not
occurring as part of an SES.
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-FC
Count of the number of occurrences of near-end failure events, and is incremented by
one each time a near-end failure event begins. Failure counts are incremented during
unavailable time.
RS-EB
Regenerator Section Errored Block (RS-EB) indicates that one or more bits are in
error within a block.
RS-ES
Regenerator Section Errored Second (RS-ES) is a one-second period with one or
more errored blocks or at least one defect.
RS-SES
Regenerator Section Severely Errored Second (RS-SES) is a one-second period
which contains 30 percent or more errored blocks or at least one defect. SES is a
subset of ES.
Table 12-1
Performance Monitoring Parameters (continued)
Parameter
Definition
