Figure 1. An example of number of SLAs that participate in the same period of time; see figure 2. The bandwidth optimization and the congestion control has to be done for that critical period (duration of new SLA).
In end-to-end QoS provisioning some bandwidth portions on the link may be reserved for certain traffic classes (and for particular set of users) so the congestion problem of concurrent flows (traversing the network simultaneously) can appear. It means that in overloaded and poorly connected MPLS/DS networks the CR (Constraint-based Routing) becomes… (More)