November 2000
Intermediate to advanced
336 pages
8h 47m
English
Content preview from Policy-Based Networking: Architecture and Algorithms
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
Start your free trial
SLA Support in the ISP Environment
Supporting SLAs in ISP environments can be done by means of multiple technologies. One of the possible ways to provide SLA support is by operating different physical networks. Another approach is to use a technology such as DiffServ.
SLA Support by Operating Multiple Networks
When different service levels are implemented as different networks, the structure of the operator's network looks like Figure 4.3. Packets belonging to different service levels are directed to different networks. This function is also known as alternate routing. With this approach, the core network is effectively split into two core subnetworks.
Figure 4.3. Parallel Physical Subnetworks for SLA Support
The responsibility of identifying ...