Nortel Networks OPTera Metro 3500 - Manual (Page 133)

Operation, administration, and maintenance (OAM) features 2-95
Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
Performance Monitoring
Performance monitoring (PM) refers to the in-service, non-intrusive
monitoring of transmission quality. The 2xGigE/FC-P2P circuit pack will
support the PM counts shown in
Table 2-19 on page 2-95 . These counts will
be monitored and binned for Ethernet and WAN signals.
Binning is supported for counts:
• 15 minute (current and previous 32)
• 1 day (current and previous)
• Untimed
Various counters are also binned:
• INFRAMES
• INFRAMESERR
• INFRAMESDISCDS
• OUTFRAMES
Note: LAN PMs ES, SES, and UAS on the 2xGigE/FC-P2P do not count
properly if defects are also present on the WAN port.
For additional information on 2xGigE/FC-P2P circuit pack, please refer to
2xGigabit Ethernet/Fibre Channel - Point-to-Point circuit pack on page 3-98 .
Fibre Channel Extended Reach
Fibre Channel extended reach avoids throughput degradation for distances up
to approximately 980 kilometers (kms) at full rate or about 18000 kilometers
(kms) at sub-rate (STS1), see
Figure 2-38 on page 2-96 . For sub-rate, this
means the ability to use 100% of the available WAN bandwidth.
Table 2-19
Performance Monitoring Service counts
PM parameter Ethernet and WAN Interface Fibre Channel
ES
(Errored Seconds) A second where at least one
INFRAMESERR occurs A second where at least one
INOCTETERR occurs
SES
(Severely Errored Seconds) Seconds where
INFRAMESERR/INFRAME > 0.01 Seconds where
INOCTETSERR > 500
UAS
(Unavailable Seconds) Ten consecutive SES counts