Page 559 - Handbook of Modern Telecommunications

4-90 CRC Handbook of Modern Telecommunications, Second Edition

Company Company
Site A Site B
SPOP A SPOP B
SLA 1 A
SK 1 SLA 1 B
SK 1
SLA 2 A
SK 2 SLA 2 B
SK 2
SLA 3 A
SK 3 SLA 3 B
SK 3
SLA 4 B
SK 4

Peering Point

FIGu RE 4.5.10 Different service classes for service providers.
• PE router
• CE router
• Load balancer
• Firewall
This boundary determines who is in charge for the purposes of administration. All combinations are
feasible depending on the agreement with the service providers. As an entry into these issues, we assume
that, with the exception of PE routers, all managed objects are managed by the enterprise. Attributes
and the actual configuration are maintained in a unified database.
The actual configuration is discovered and compared with the configuration database.

4.5.3.3.3 Classification of SAPs
Together with service providers, enterprises determine the necessary number of different service classes
for SAPs. This depends greatly on the rating and accounting model. It is recommended to use maximal
three service classes from the enterprise perspective.
• Best effort (Bronze)
• Basis (Silver)
• Premium (Gold)
It is recommended that the following Key Performance Indicators (KPI) are included:
• Availability
• Service acceptance
• Reaction time
• Periodicity of notifications
• Network delay
• Variance
• Packet loss
• Sampling rate
• Access bandwidth
These KPIs will be quantified for each service class. Also the evaluation period is going to be defined.
Furthermore there is a correlation with different service classes that can be combined with network
delay, variance, and packet loss. These service classes are:
• Real time
• Critical data