| 摘要 |
For use in a Multi-Protocol Label Switching (MPLS) domain, a method for forwarding a data packet including the steps of: (a) establishing a label switched path between a pair of distinct endpoint network elements of a plurality of at least two network elements, the label switched path including one or more protected path segments each defined between a source network element and a destination network element, each protected path segment being one of either a protected link path segment for protecting a link between neighboring source and destination network elements or a protected intermediate network element path segment for protecting an intermediate network element sandwiched between otherwise neighboring source and destination network elements; (b) establishing a backup path segment per protected path segment excluding any shared resource therewith except for its source and destination network elements; and (c) on arrival of a data packet at a source network element of a backup path segment along the label switched path, selectively rerouting the data packet along the backup path segment to its associated destination network element instead of along its associated protected path segment whereupon on arrival thereat ostensibly from its neighboring downstream network element along the label switched path, the data packet proceeds along the label switched path. |
