Cisco ONS 15454 SDH Specifications download pdf (Page 344)

8-40

Cisco ONS 15454 SDH Installation and Operations Guide, R3.3

May 2002

Chapter 8 SDH Performance Monitoring

SDH Performance Monitoring for Optical Cards

MS-PSD-W

For a working line in a 2-fiber MS-SPRing, Multiplex Section Protection

Switching Duration-Working (MS-PSD-W) is a count of the number of

seconds that service was carried on the protection line. MS-PSD-W

increments on the failed working line and MS-PSD increments on the

active protect line.

MS-PSC-S

In a 4-fiber MS-SPRing, Multiplex Section Protection Switching

Count-Span (MS-PSC-S) is a count of the number of times service

switches from a working line to a protection line plus the number of times

it switches back to the working line. A count is only incremented if span

switching is used.

MS-PSD-S

In a 4-fiber MS-SPRing, Multiplex Section Protection Switching

Duration-Span (MS-PSD-S) is a count of the seconds that the protection

line was used to carry service. A count is only incremented if span

switching is used.

MS-PSC-R

In a 4-fiber MS-SPRing, Multiplex Section Protection Switching

Count-Ring (MS-PSC-R) is a count of the number of times service

switches from a working line to a protection line plus the number of times

it switches back to a working line. A count is only incremented if ring

switching is used.

MS-PSD-R

In a 4-fiber MS-SPRing, Multiplex Section Protection Switching

Duration-Ring (MS-PSD-R) is a count of the seconds that the protection

line was used to carry service. A count is only incremented if ring

switching is used.

Table 8-32 High-Order VC4 and VC4-Xc Path PMs for the STM-16 and STM-64 Cards

Parameter Definition

Note SDH path PMs will not count unless IPPM is enabled. For additional information, see the

“Enabling Intermediate-Path Performance Monitoring” section on page 8-14. The far-end

IPPM feature is not supported in SDH Software R3.3. However, SDH path PMs can be

monitored by logging into the far-end node directly.

HP-EB

High-Order Path Errored Block (HP-EB) indicates one or more bits are in

error within a block.

HP-BBE

High-Order Path Background Block Error (HP-BBE) is an errored block

not occurring as part of a severely errored second (SES).

HP-ES

High-Order Path Errored Second (HP-ES) is a one second period with one

or more errored blocks or at least one defect.

HP-SES

High-Order Path Severely Errored Seconds (HP-SES) is a one-second

period containing >

30% errored blocks or at least one defect. SES is a

subset of ES.

HP-UAS

High-Order Path Unavailable Seconds (HP-UAS) is a count of the

seconds when the VC path was unavailable. A low-order path becomes

unavailable when ten consecutive seconds occur that qualify as HP-SESs,

and it continues to be unavailable until ten consecutive seconds occur that

do not qualify as HP-SESs.

Table 8-31 Protection Switch Count PMs for the STM-16 and STM-64 Cards, Near-End (continued)

Parameter Definition

1 2 ... 339 340 341 342 343 344 345 346 347 348 349 ... 503 504

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