Traffic-Engineered LSPs

Traffic engineering is the task of routing network traffic to avoid points of congestion and make efficient use of high bandwidth interfaces. When used as an application of MPLS, traffic engineering involves creating LSPs that make the best use of available network resources; that is, traffic-engineered LSPs. This section explains the process of creating traffic-engineered LSPs.

Creating traffic-engineered LSPs involves the following tasks:

Gathering information about the network
Using the gathered information to select optimal paths through the network
Setting up and maintaining the paths

For traffic-engineered signaled LSPs, devices can perform these tasks dynamically. How traffic-engineered LSPs are configured, established, and activated illustrates the process that takes place to configure, establish, and activate traffic-engineered signaled LSPs.

Note

Adaptive LSPs can have primary and secondary sessions up at the same time. Extreme devices support a maximum of 5000 LSPs, and a maximum of 10000 sessions.