17-27
Cisco ONS 15454 DWDM Reference Manual, R8.5
78-18343-02
Chapter 17 Performance Monitoring
17.9 SDH PM Parameter Definitions
17.9 SDH PM Parameter Definitions
Table 17-30 gives definitions for each type of SDH PM parameter available on an ONS 15454 ETSI
node. These parameters become available when the client type is set to STM-1, STM-4, or STM-16 on
a TXP_MR_2.5G or TXPP_MR_2.5G card or to STM-64 on a TXP_MR_10G, TXP_MR_10E,
TXP_MR_10E_C, or TXP_MR_10E_L card. The STM-16 client PM is available on MXP_2.5G_10G,
MXP_2.5G_10E, MXP_2.5G_10E_C, MXP_2.5G_10E_L, MXP_MR_10DME_C, and
MXP_MR_10DME_L cards. The STM-16 trunk PM is available on MXP_MR_2.5G and
MXPP_MR_2.5G cards.
FC-L Line Failure Count (FC-L) is a count of the number of near-end line
failure events. A failure event begins when an Alarm Indication Signal
Line (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.
SEF-S Severely Errored Framing Seconds (SEFS-S) is a count of the seconds
when an SEF defect was present. An SEF defect is expected to be present
during most seconds when an 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.
Note The RTRV-PM-<MOD2> command does not retrieve SEF-S
counter for OC192/STM64 payloads on ADM-10G cards.
SES-L Line Severely Errored Seconds (SES-L) is a count of the seconds
containing more than a particular quantity of anomalies (BPV + EXZ >
44) and/or defects on the line.
SES-S Section Severely Errored Seconds (SES-S) is a count of the seconds when
K (see Telcordia GR-253 for value) or more section-layer BIP errors were
detected or an SEF or LOS defect was present.
UAS-L Line Unavailable Seconds (UAS-L) is a count of the seconds when the line
is unavailable. A line becomes unavailable when ten consecutive seconds
occur that qualify as SES-Ls, and it continues to be unavailable until ten
consecutive seconds occur that do not qualify as SES-Ls.
Table 17-29 SONET PM Parameters (continued)
Parameter Definition
Table 17-30 SDH PM Parameters
Parameter Definition
MS-BBE Multiplex Section Background Block Error (MS-BBE) is an errored block not
occurring as part of an SES.
MS-BBER Multiplex Section Background Block Error Ratio (MS-BBER) is the ratio of
BBE to total blocks in available time during a fixed measurement interval. The
count of total blocks excludes all blocks during SESs.
MS-EB Multiplex Section Errored Block (MS-EB) indicates that one or more bits are
in error within a block.
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