Datasheet

15-42
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 15 Performance Monitoring
15.8.1 FC_MR-4 Card Performance Monitoring Parameters
15.8.1.2 FC_MR-4 Utilization Window
The Utilization window shows the percentage of Tx and Rx line bandwidth used by the ports during
consecutive time segments. The Utilization window provides an Interval menu that enables you to set
time intervals of 1 minute, 15 minutes, 1 hour, and 1 day. Line utilization is calculated with the following
formulas:
Rx = (inOctets + inPkts * 24) * 8 / 100% interval * maxBaseRate
Tx = (outOctets + outPkts * 24) * 8 / 100% interval * maxBaseRate
The interval is defined in seconds. The maxBaseRate is defined by raw bits per second in one direction
for the port (that is, 1 Gbps or 2 Gbps). The maxBaseRate for FC_MR-4 cards is shown in Table 15-22.
Note Line utilization numbers express the average of ingress and egress traffic as a percentage of capacity.
15.8.1.3 FC_MR-4 History Window
The History window lists past FC_MR-4 statistics for the previous time intervals. Depending on the
selected time interval, the History window displays the statistics for each port for the number of previous
time intervals as shown in Table 15-23. The parameters are defined in Table 15-9 on page 15-21.
mediaIndStatsRxFramesTooLong Number of Fibre Channel frames received with frame size higher
than the provisioned maximum frame size.
mediaIndStatsRxFramesBadCRC Number of Fibre Channel frames received with bad CRC.
mediaIndStatsTxFramesBadCRC Number of Fibre Channel frames transmitted with bad CRC.
fcStatsLinkRecoveries Number of link recoveries.
fcStatsRxCredits Number of buffers received to buffer credits T (valid only if
distance extension is enable).
fcStatsTxCredits Number of buffers transmitted to buffer credits T (valid only if
distance extension is enable).
fcStatsZeroTxCredits Number of transmit attempts that failed because of unavailable
credits.
8b10bInvalidOrderedSets 8b10b loss of sync count on Fibre Channel line side.
8b10bStatsEncodingDispErrors 8b10b disparity violations count on Fibre Channel line side.
gfpStatsCSFRaised Number of GFP Client Signal Fail frames detected.
Parameter Definition
Table 15-22 maxBaseRate for STS Circuits
STS maxBaseRate
STS-24 850000000
STS-48 850000000 x 2
1
1. For 1 Gigabit of bit rate being transported, there is only 850 Mbps of actual data because of 8b->10b conversion. Similarly,
for 2 G of bit rate being transported there is only 850 Mbps x 2 of actual data.