| 摘要 |
The invention provides a distributed back-up mechanism and a two-step method for facilitating fast control plane recovery in a switched network network. In a preferred embodiment, a Label Information Database (LID) maintained at a control node of a GMPLS network i s mirrored to an Upstream node using the Label Distribution Protocol (LDP). After a control plane interruption resulting in the LDP restart, the control node, using the mirrored informati on at the upstream node, conducts first a fast coarse LID recovery wherein only the idle labels are identified, to enable the restarted LDP session to process new connection setup. A detailed LDP state information recovery performs in the background in parallel to the normal LD P operations, e.g. using on-demand LDP queries.
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