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Chapter 8
Performance Monitoring
Table 8-10 VT Path PMs for the DS1 and DS1N Cards (continued)
Parameter
SES-V
UAS-V
Table 8-11 SONET Path PMs for the DS1 and DS1N Cards
Parameter
STS CV-P
STS ES-P
STS FC-P
STS SES-P
STS UAS-P
November 2001
Definition
Severely Errored Seconds VT Layer (SES-V) is a count of seconds when
K (600) or more VT Path BIP errors were detected. SES-V can also be
caused by an AIS-V defect (or a lower-layer, traffic-related, near-end
defect) or an LOP-V defect.
Unavailable Second VT Layer (UAS-V) is a count of the seconds when
the VT path was unavailable. A VT path becomes unavailable when ten
consecutive seconds occur that qualify as SES-Vs, and it continues to be
unavailable until ten consecutive seconds occur that do not qualify as
SES-Vs.
Definition
Near-End STS Path Coding Violations (CV-P) is a count of BIP errors
detected at the STS path layer (i.e., using the B3 byte). Up to eight BIP
errors can be detected per frame, with each error incrementing the current
CV-P second register.
Near-End STS Path Errored Seconds (ES-P) is a count of the seconds
when at least one STS path BIP 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.
Near-End STS Path Failure Counts (FC-P) is a count of the number of
near-end STS path failure events. A failure event begins when an AIS-P
failure, an LOP-P failure, a UNEQ-P, or a TIM-P failure is declared. A
failure event also begins if the STS PTE that is monitoring the path
supports ERDI-P for that path. The failure event ends when these failures
are cleared.
Near-End STS Path Severely Errored Seconds (SES-P) is a count of the
seconds when K (2400) or more STS path BIP errors were detected. An
AIS-P defect (or a lower-layer, traffic-related, near-end defect) or an
LOP-P defect can also cause an STS SES-P.
Near-End STS Path Unavailable Seconds (UAS-P) is a count of the
seconds when the STS path was unavailable. An STS path becomes
unavailable when ten consecutive seconds occur that qualify as SES-Ps,
and it continues to be unavailable until ten consecutive seconds occur that
do not qualify as SES-Ps.
Cisco ONS 15454 Installation and Operations Guide
Performance Monitoring for Electrical Cards
8-21
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