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11-8
Cisco ONS 15310-MA SDH Reference Manual, Release 9.1 and Release 9.2
78-19417-01
Chapter 11 Performance Monitoring
Performance Monitoring Parameter Definitions
MS-ES Multiplex Section Errored Second (MS-ES) is a one-second period with
one or more errored blocks or at least one defect.
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-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.
MS-PPJC-Pgen Multiplex Section Positive Pointer Justification Count, Path Generated
(MS-PPJC-Pgen) is a count of the positive pointer justifications generated
for a particular path.
MS-PSC (1+1 protection) In a 1+1 protection scheme for a working card, Multiplex Section
Protection Switching Count (MS-PSC) is a count of the number of times
service switches from a working card to a protection card plus the number
of times service switches back to the working card.
For a protection card, MS-PSC is a count of the number of times service
switches to a working card from a protection card plus the number of times
service switches back to the protection card.
MS-PSC
1
(MS-SPRing) For a protect line in a two-fiber multiplex section-shared protection ring
(MS-SPRing), Multiplex Section Protection Switching Count (MS-PSC)
refers to the number of times a protection switch has occurred either to a
particular span’s line protection or away from a particular span’s line
protection. Therefore, if a protection switch occurs on a two-fiber
MS-SPRing, the MS-PSC of the protection span to which the traffic is
switched will increment, and when the switched traffic returns to its
original working span from the protect span, the MS-PSC of the protect
span will increment again.
MS-PSC-R
1
In a four-fiber MS-SPRing, Multiplex Section Protection Switching
Count-Ring (MS-PSC-R) 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 a working line. A count is only incremented if ring
switching is used.
MS-PSC-S In a four-fiber MS-SPRing, Multiplex Section Protection Switching
Count-Span (MS-PSC-S) 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. A count is only incremented if span
switching is used.
Table 11-2 Performance Monitoring Parameters (continued)
Parameter Definition