MPLS
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MPLS
Is MPLS a viable replacement for frame?
MPLS with QOS
MPLS is a QoS-enabling technology to provide mechanisms for traffic engineering and bandwidth guarantees along specified paths. The fundamental objective of any QoS mechanism is to ensure that excessive congestion does not occur for higher priority packets which may result in packet loss, delay or jitter. QoS mechanisms do not create additional capacity, but only support prioritization of traffic or allocation of capacity under congested conditions. Over-provisioning and traffic engineering (e.g. MPLS) are other QoS mechanisms that strive to provide the same level of performance for all packets by avoiding congestion altogether. For example, over-provisioning can be achieved by monitoring the flows and providing capacity for twice the maximum flow size so that the network never runs above 50 percent utilization (Sprint's backbone approach). Traffic engineering also monitors the traffic flows in the network but then applies some algorithms to route the traffic such that there is never congestion, but the network operates at a level of utilization greater than 50 percent.
Combining DiffServ-based classification and PHBs with MPLS-based traffic engineering leads to true QoS in packet backbones.
When discussing deploying QoS, it is useful to talk about two general areas of deployment. The first area is the core of the network. The second is the access network, including the customer premises equipment CPE and the edge router. Congestion is more likely to occur on access links between the consumer’s CPE and an IP network edge router, and this is a principal area of focus for QoS mechanisms.
Is MPLS a viable option to replace Point to Point services?
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