Chapter 3 Maintaining the Cisco 10005 ESR
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Cisco 10005 ESR Hardware Overview and Maintenance Guide
OL-1102-07
Spare Parts
Service providers usually draw on their own experience with similar equipment
as they try to determine the number of spare parts of a given item to keep on hand.
In developing a strategy for spare parts, the service providers must
•
Evaluate the criticality of the equipment.
•
Estimate the mean time between failures, a key component of any spares
strategy.
•
Calculate the number of production routers (and associated components) they
need to have on hand. For example, if they have the critical mass to shift
capacity to other locations or other devices, they may be able to carry fewer
spares.
Service providers may also subscribe to services that supply them with
replacement parts, sometimes with turnaround times as short as 4 hours.
Situational Analysis
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