Datasheet

15-3
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 15 Performance Monitoring
15.2 Intermediate-Path Performance Monitoring
Note Due to limitations of memory and the number of TCAs generated by different platforms, you can
manually add or modify the following two properties to their property file (CTC.INI for Windows and
.ctcrc for UNIX) to fit the need:
ctc.15xxx.node.tr.lowater=yyy (where xxx is the platform and yyy is the number of the lowater mark.
The default lowater mark is 25.)
ctc.15xxx.node.tr.hiwater=yyy (where xxx is the platform and yyy is the number of the hiwater mark.
The default hiwater mark is 50.)
If the number of incoming TCA is greater than the hiwater mark, it will keep the latest lowater mark and
discard older ones.
Change the threshold if the default value does not satisfy your error monitoring needs. For example,
customers with a critical E1 installed for 911 calls must guarantee the best quality of service on the line;
therefore, they lower all thresholds so that the slightest error raises a TCA.
15.2 Intermediate-Path Performance Monitoring
Intermediate-path performance monitoring (IPPM) allows transparent monitoring of a constituent
channel of an incoming transmission signal by a node that does not terminate that channel. Many large
ONS 15454 SDH networks only use line terminating equipment (LTE), not path terminating equipment
(PTE). Table 15-2 shows ONS 15454 SDH cards that are considered LTE.
Software Release 3.0 (R3.0) and later allow LTE cards to monitor near-end PM data on individual
high-order paths by enabling IPPM. After enabling IPPM provisioning on the line card, service providers
can monitor high-order paths that are configured in pass-through mode on an ONS 15454 SDH operating
in SDH AU4 mode, thus making troubleshooting and maintenance activities more efficient.
IPPM occurs only on high-order paths that have IPPM enabled, and TCAs are raised only for PM
parameters on the IPPM enabled paths. The monitored IPPM parameters are HP-EB, HP-BBE, HP-ES,
HP-SES, HP-UAS, HP-ESR, HP-SESR, and HP-BBER.
Table 15-2 Line Terminating Equipment (LTE)
Electrical LTE
STM1E-12 —
Optical LTE
OC3 IR 4/STM1 SH 1310 OC3 IR/STM1 SH 1310-8
OC12 IR/STM4 SH1310 OC12 LR/STM4 LH1310
OC12 LR/STM4 LH 1550 OC12 IR/STM4 SH 1310-4
OC48 IR/STM16 SH AS 1310 OC48 LR/STM16 LH AS 1550
OC48 ELR/STM16 EH 100 GHz OC192 SR/STM64 IO 1310
OC192 IR/STM64 SH 1550 OC192 LR/STM64 LH 1550
OC192 LR/STM64 LH ITU 15xx.xx —