Datasheet

15-9
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 15 Performance Monitoring
15.4 Performance Monitoring Parameter Definitions
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. The MS-PSC PM is only
applicable if revertive line-level protection switching is used.
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.
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. MS-PSC-W increments
on the failed working line and MS-PSC increments on the active protect
line.
For a working line in a four-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 Multiplex Section Protection Switching Duration (MS-PSD) applies to the
length of time, in seconds, that service is carried on another line. For a
working line, MS-PSD is a count of the number of seconds that service was
carried on the protection line.
For the protection line, MS-PSD is a count of the seconds that the line was
used to carry service. The MS-PSD PM is only applicable if revertive
line-level protection switching is used. MS-PSD increments on the active
protect line and MS-PSD-W increments on the failed working line.
Table 15-3 Performance Monitoring Parameters (continued)
Parameter Definition