Identifying a label-switched path (LSP) associated with a multi protocol label switching (MPLS) service and diagnosing a LSP related fault

A method of diagnosing a Label-switched Path (LSP) related fault in a Multi Protocol Label Switching (MPLS) based network, comprising:

• identifying all segments participating to form a Label-switched Path;
• for each segment, determining an OutSegment Next Hop value on participating routers of the network;
• polling each of said OutSegment Next Hop value to identify a modified OutSegment;
• characterizing all Label-switched Paths related to the modified OutSegment as impacted;
• characterizing Multi Protocol Label Switching (MPLS) services based on the impacted Label-switched Path as impacted;
• and
• generating an incident to notify an impacted Multi Protocol Label Switching (MPLS) service.

A system to identify a Label-switched Path (LSP) associated with a Multi Protocol Label Switching (MPLS) service in a network, comprising:

• a processor;
• a service mapping module, implemented by the processor to:
• identify the MPLS service;
• determine logical neighbors of the MPLS service;
• for each logical neighbor of the MPLS service, identify an LSP label;
• identify a unique out segment of the LSP associated with the Multi Protocol Label Switching (MPLS) service based on the LSP label;
• determine whether the LSP is a Traffic Engineering (TE) tunnel or determine whether the LSP is a Label Distribution Protocol (LDP) based path;
• and
• store the TE tunnel related information if the LSP is the TE tunnel or store the LSP label related information if the LSP is the LDP based path;
• and
• a display device to display the Label-switched Path (LSP) associated with a Multi Protocol Label Switching (MPLS) service in a network.

A non-transitory processor readable medium, the non-transitory processor readable medium comprising machine executable instructions, the machine executable instructions when executed by a processor causes the processor to:

• identify a Multi Protocol Label Switching (MPLS) service in a network;
• determine logical neighbors of the MPLS service;
• for each logical neighbor of the MPLS service, identify an LSP label;
• identify a unique out segment of Label-switched Path (LSP) associated with the Multi Protocol Label Switching (MPLS) service based on the LSP label;
• determine an entire LSP for the MPLS service upon identification of the unique out segment;
• identify all segments in the LSP for the MPLS service;
• for each segment, determine an OutSegment Next Hop value on participating routers of the network;
• poll each of the OutSegment Next Hop values to identify a modified OutSegment;
• characterize all LSPs related to the modified OutSegment as impacted;
• characterize MPLS services based on the impacted Label-switched Path as impacted;
• and
• generate an incident to notify an impacted Multi Protocol Label Switching (MPLS) service.