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Name: MPLS LSP tunnel preemption Adobe Reader
Type: Application Note
Size: 275 KB
Date: June 2001
 

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MPLS LSP tunnel preemption

The internet is evolving very rapidly to become the next public network infrastructure for real-time and delay sensitive services such as voice and multimedia, and value-added applications such as financial transactions. However, the successful delivery of these services is dependent upon the ability to provide reliable, predictable, and class-aware IP transport.

Traffic patterns are constantly changing in the network, creating the need for "new" LSP establishment for network optimization. When a lack of bandwidth occurs, an attempt to establish an LSP might fail. The MPLS preemption feature provides a way to define the relative importance of LSPs such as high-priority and low-priority tunnels in favor of higher-priority LSPs.