Mean Time Between Failure And System Availability - Cisco ASR 5000 series Product Overview

Redundancy and Availability Features

Mean Time Between Failure and System Availability

Mean Time Between Failure (MTBF) data is used to provide statistical information as to the length of time that should
expire before a particular card or system fails. This information is calculated using the following method:
Calculated MTBF - Expected elapsed time before failure occurs using the method defined in Telcordia TR-NWT-
000332-CORE. This is based on reliability of components and design factors.
Failure per million hours (Fpmh) identifies the predicted failure rate per one million hours (for every 1,000,000 hours of
operation, ―FITS number‖ of failures would be expected to occur) for a component of the system.
MTBF Table
The following table shows the MTBF characteristics of each major component of the system.
Table 26. Mean Time Between Failure Statistics
Part Number
600-00-1111
600-00-3026
600-00-3025
600-00-5052
600-00-5038 Multi-Mode 600-00-5051
Single Mode 600-00-5039 Copper
600-00-5016
600-00-5001
600-00-5002
600-00-5003
600-00-5101
600-00-1112
600-00-1104
600-00-1103
OL-22938-02
Description
Chassis with Midplane
System Management Card
Packet Services Card (PSC or
PSC2)
10 Gigabit Ethernet Line Card
(XGLC)
Quad Gig-E Card (QGLC)
ATM/POS OC-3 SM IR-1 Card
optical daughter card
Switch Processor I/O Card
Redundancy Crossbar Card
Ethernet 10/100 Card (FELC)
Ethernet 1000 Card (GELC)
Power Filter Unit (165A)
Fan Tray Unit - Lower
Fan Blower Unit - Upper
Mean Time Between Failure and System Availability ▀
MTBF (Hours) MTBF
(Years)
16,386,995 1869.38
104,372 11.91
102,294 11.68
247,720 28.28
258,606 29.52
214,492 48.6 73.4
1,419,581
333,999 38.13
555,862 63.46
495,886 56.61
396,715 45.29
967,118 110.40
70,517 8.05
120,178 13.72
Cisco ASR 5000 Series Product Overview ▄
Fpmh (Failure per
million hours)
0.061
9.58
9.78
4.04
3.867
4.66 0.70
2.99
1.79
2.01
2.52
1.03
19.51
18.72