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Chapter 15
Performance Monitoring
Table 15-3
Parameter
PPJC-PGEN-P
PJCS-PDET-P
PJCS-PGEN-P
PSC
PSC-R
PSC-S
PSC-W
PSD
78-18106-01
Performance Monitoring Parameters (continued)
Definition
Positive Pointer Justification Count, STS Path Generated (PPJC-PGEN-P)
is a count of the positive pointer justifications generated for a particular
path to reconcile the frequency of the SPE with the local clock.
Pointer Justification Count Seconds, STS Path Detect (NPJCS-PDET-P)
is a count of the one-second intervals containing one or more PPJC-PDET
or NPJC-PDET.
Pointer Justification Count Seconds, STS Path Generate (PJCS-PGEN-P)
is a count of the one-second intervals containing one or more PPJC-PGEN
or NPJC-PGEN.
In a 1 + 1 protection scheme for a working card, Protection Switching
Count (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, 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. The PSC PM parameter
is only applicable if revertive line-level protection switching is used.
In a four-fiber bidirectional line switched ring (BLSR), Protection
Switching Count-Ring (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.
In a four-fiber BLSR, Protection Switching Count-Span (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.
For a working line in a two-fiber BLSR, Protection Switching
Count-Working (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.
For a working line in a four-fiber BLSR, 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. PSC-W increments
on the failed line and PSC-R or PSC-S increments on the active protect
line.
Protection Switching Duration (PSD) applies to the length of time, in
seconds, that service is carried on another line. For a working line, PSD
is a count of the number of seconds that service was carried on the
protection line.
For the protection line, PSD is a count of the seconds that the line was
used to carry service. The PSD PM is only applicable if revertive
line-level protection switching is used.
15.4 Performance Monitoring Parameter Definitions
Cisco ONS 15454 Reference Manual, R8.5
15-9
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