Cisco Cisco Packet Data Interworking Function (PDIF) Documentation Roadmaps
Redundancy and Availability Features
▀ Mean Time Between Failure and System Availability
▄ Cisco ASR 5000 Series Product Overview
OL-22937-01
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:
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.
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.
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 37. Mean Time Between Failure Statistics
Chassis
Part Number
Description
MTBF (Hours)
MTBF
(Years)
(Years)
Fpmh (Failure
per million
per million
hours)
ST16
Only
Only
600-00-1101
ST16 Chassis with
Midplane (125A PFU
support)
Midplane (125A PFU
support)
16,386,995
1869.38
0.061
600-00-1102
Power Filter Unit (125A)
967,118
110.40
1.03
600-00-1111
ST16 Chassis with
Midplane (165A PFU
support)
Midplane (165A PFU
support)
16,386,995
1869.38
0.061
600-00-3002
Switch Processor Card
(SPC)
(SPC)
107,890
12.32
9.27
600-00-3001
Packet Accelerator Card
(PAC)
(PAC)
129,614
14.80
7.72
ASR 5000
Only
Only
600-00-1111
ASR 5000 Chassis with
Midplane
Midplane
16,386,995
1869.38
0.061
600-00-3026
System Management Card
104,372
11.91
9.58
600-00-3025
Packet Services Card (PSC
or PSC2)
or PSC2)
102,294
11.68
9.78
600-00-5052
10 Gigabit Ethernet Line
Card (XGLC)
Card (XGLC)
247,720
28.28
4.04
600-00-5038 Multi-Mode600-00-
5051 Single Mode600-00-5039
Copper
5051 Single Mode600-00-5039
Copper
Quad Gig-E Card (QGLC)
258,606
29.52
3.867