8-36
Cisco ONS 15327 User Documentation, R3.3
June 2002
Chapter 8 Performance Monitoring
Performance Monitoring for Optical Cards
Table 8-26 Near-End Protection-Switching PMs for the OC-48 Cards
Parameter
Definition
For information about Troubleshooting UPSR switch counts, see
For information about creating circuits that perform a switch, see
PSC (BLSR)
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.
PSC (1+1 protection)
In a 1+1 protection scheme for a working card, 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.
PSD
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.
PSC-W
For a working line in a 2-fiber BLSR, 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.
PSD-W
For a working line in a 2-fiber BLSR, PSD-W is a count of the number of
seconds that service was carried on the protection line. Protection
Switching Duration-Working (PSD-W) increments on the failed working
line and PSD increments on the active protect line.
Table 8-27 Near-End SONET Path PMs for the OC-48 Cards
Parameter
Definition
Note
SONET path PMs will not count unless IPPM is enabled. For additional information, see the
“Intermediate-Path Performance Monitoring Reference” section on page 8-12
STS CV-P
Near-End STS Path Coding Violations (STS CV-P) is a count of B IP
errors detected at the STS path layer (i.e., using the B3 byte). Up to eight
B IP errors can be detected per frame; each error increments the current
CV-P second register.
STS ES-P
Near-End STS Path Errored Seconds (STS ES-P) is a count of the seconds
when at least one STS path B IP error was detected. An AIS-P defect (or
a lower-layer, traffic-related, near-end defect) or an LOP-P defect can
also cause an STS ES-P.
Summary of Contents for ONS 15327
Page 22: ...Contents xxii Cisco ONS 15327 User Documentation June 2002 I N D E X ...
Page 30: ...Figures xxviii Cisco ONS 15327 User Documentation June 2002 ...
Page 44: ...Procedures xlii Cisco ONS 15454 Installation and Operations Guide R3 2 June 2002 ...
Page 540: ...Glossary GL 16 Cisco ONS 15327 User Documentation R3 3 June 2002 ...
