Cisco ASR 5000 Series User Manual

Redundancy and Availability Features
▀ Mean Time Between Failure and System Availability
▄ Cisco ASR 5000 Series Product Overview
OL-22938-02
System Availability
System-level Mean Time To Failure (MTTF), is the average interval of time that a component will operate before
failing. Reliability information is based on the number of overall anticipated failures of the individual components, in
conjunction with any redundancy schemes employed to minimize the impact of such failures.
The following table provides service availability calculations (based on reliability modeling) for the ASR 5000
platform.
Table 27. Platform Service Availability Calculations
Platform
Operational Uptime
Yearly Downtime
MTTF
(%)
(minutes)
Hours
Years
ASR 5000
99.999978
0.12
14,077,473
1605.91
One suggestion to help improve overall system availability is to institute an on-site spares program, wherein key
components are housed locally with the deployed equipment. The following section defines a recommended spares
program and quantities for the system.
Mean Time To Repair (MTTR) is the amount of time needed to repair a component, recover the system, or otherwise
restore service after a failure. System availability calculations are based on the industry standard of four hours.

Cisco ASR 5000 Series Specifications

General

Brand	Cisco
Model	ASR 5000 Series
Category	Network Router
Language	English