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Label switching and routing

A key idea in label switching is that the use of labels can effect some centralization in route determination. Unlike IP-only routing algorithms, which can only make single-hop determinations, a label switched environment can create multiple-hop path segments or tree structures by distributing appropriate label information. Typically, labels are generated for a set of covering paths or trees for some network, and incoming packets are labeled for the appropriate path or tree. The path determination then needs only to be done once or some limited number of times; at the intermediate nodes, the label alone determines the next hop.

This has a number of advantages:


next up previous
Next: The NIST Switch platform Up: What and why multilayer Previous: Label switching and link
Mark Carson
1998-05-01