Table 8-20 Near-End Protection-Switching Pms For The Oc-12 Card - Cisco ONS 15327 User Documentation

Chapter 8 Performance Monitoring

Table 8-20 Near-End Protection-Switching PMs for the OC-12 Card

Parameter
For information about Troubleshooting UPSR switch counts, see
Troubleshooting."
"Circuits and Tunnels."
PSC (BLSR)
PSC (1+1 protection)
PSD
PSC-W
PSD-W
June 2002
Definition
For information about creating circuits that perform a switch, see
For a protect line in a 2-fiber ring, Protection Switching Count (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 2-fiber BLSR, the
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 PSC of the protect span will increment again.
4-fiber BLSR is not supported on the OC-12 card; therefore, the
Note
PSC-S and PSC-R PMs do not increment.
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 is only
applicable if revertive line-level protection switching is used.
For an active protection line in a 2-fiber BLSR, Protection Switching
Duration (PSD) is a count of the number of seconds that the protect line
is carrying working traffic following the failure of the working line. PSD
increments on the active protect line and Protection Switching
Duration-Working (PSD-W) increments on the failed working line.
4-fiber BLSR is not supported on the OC-12 card; therefore, the
Note
Protection Switching Duration-Span (PSD-S), and Protection
Switching Duration-Ring (PSD-R) PMs do not increment.
For a working line in a 2-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 2-fiber BLSR, Protection Switching
Duration-Working (PSD-W) is a count of the number of seconds that
service was carried on the protection line. PSD-W increments on the
failed working line and PSD increments on the active protect line.
Performance Monitoring for Optical Cards
Chapter 14, "Alarm
Cisco ONS 15327 User Documentation, R3.3
Chapter 6,
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