Cisco ONS 15327, Пользовательская документация

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Cisco ONS 15327 User Documentation, R3.3
June 2002
Chapter 8 Performance Monitoring
Performance Monitoring for Optical Cards
SES-S
Section Severely Errored Seconds (SES-S) is a count of the seconds when
K (see GR-253 for value) or more section-layer B IP errors were detected
or a (Severely Errored Frame) SEF or Loss of Signal (LOS) defect was
present.
SEFS-S Section Severely Errored Framing Seconds (SEFS-S) is a count of the
seconds when a Severely Errored Frame (SEF) defect was present. A
(Severely Errored Frame) SEF defect is expected to be present during
most seconds when a Loss of Signal (LOS) or Loss of Frame (LOF) defect
is present. However, there can be situations when the SEFS-S parameter
is only incremented based on the presence of the SEF defect.
Table 8-12 Near-End Line Layer PMs for the OC-3 Cards Card
Parameter Definition
CV-L Code Violation Line (CV-L) is a count of B IP errors detected at the
line-layer (i.e. using the B2 bytes in the incoming SONET signal). Up to
8 x N B IP errors can be detected per STS-N frame; each error increments
the current CV-L second register.
ES-L Errored Seconds Line (ES-L) is a count of the seconds when at least one
line-layer B IP error was detected or an AIS-L defect was present.
SES-L Severely Errored Seconds Line (SES-L) is a count of the seconds when K
(see GR-253-CORE for values) or more line-layer B IP errors were
detected or an AIS-L defect was present.
UAS-L Near-End Line Unavailable Seconds (UAS-L) is a count of the seconds
when the line is considered unavailable. A line becomes unavailable at the
onset of ten consecutive seconds that qualify as Severely Errored Seconds
Line (SES-Ls), and continues to be unavailable until the onset of ten
consecutive seconds occur that do not qualify as SES-Ls.
FC-L Near-End Line Failure Count (FC-L) is a count of the number of near-end
line failure events. A failure event begins when an AIS-L failure is
declared or when a lower-layer traffic-related, near-end failure is
declared. This failure event ends when the failure is cleared. A failure
event that begins in one period and ends in another period is counted only
in the period where it begins.
Table 8-11 Near-End Section PMs for the OC-3 Card (continued)
Parameter Definition