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Cisco ONS 15454 SDH Reference Manual, R4.6
April 2008
Chapter 15 Performance Monitoring
15.6.3 STM-4 and STM4 SH 1310-4 Card Performance Monitoring Parameters
MS-PSC-W For a working line in a two-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.
PSC-W increments on the failed working line and PSC 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 PSD increments on
the active protect line.
1. 4-fiber MS-SPRing is not supported on the STM-4 and STM4 SH 1310-4 cards; therefore, the MS-PSC-S and MS-PSC-R PM
parameters do not increment.
Table 15-38 High-Order VC4 and VC4-Xc Path PM Parameters for the Near-End STM-4
and STM4 SH 1310-4 Cards
Parameter Definition
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. The far-end IPPM
feature is not supported on the STM-4 and STM4 SH 1310-4 cards. However, SDH path PM
parameters can be monitored by logging into the far-end node directly.
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-UAS High-Order Path Unavailable Seconds (HP-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 HP-SESs, and it
continues to be unavailable until ten consecutive seconds occur that do not
qualify as HP-SESs.
HP-BBE High-Order Path Background Block Error (HP-BBE) is an errored block
not occurring as part of an SES.
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 15-37 Protection Switch Count PM Parameters for the Near-End STM-4 and STM4 SH 1310-4
Cards (continued)
Parameter Definition