Service Level Agreement (SLA) for a service 24x365
| Availability | Downtime per Year |
|---|---|
| 99.000% | 3d 15h 36m |
| 99.500% | 1d 19h 48m |
| 99.900% | 8h 46m |
| 99.950% | 4h 23m |
| 99.990% | 53m |
| 99.999% | 5m |
| 99.9999% | 30s |
REF:https://www.ciscolive.com/c/dam/r/ciscolive/us/docs/2015/pdf/BRKNMS%202518.pdf Hatin Badr, 2015