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Cisco Bug: CSCvt87791 - PCE unable to compute NODE+SRLG disjoint path in complex topologies

Last Modified

Jul 16, 2020

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases


Description (partial)

When an operator requests NODE+SRLG disjoint path to be computed by the PCE, in certain conditions the algorithm may not be able to find a path satisfying both node and SRLG disjointness, in which case it will fall back to only SRLG-disjoint path (if topology permits).

This condition can happen in large and complex networks with many available paths. It most often happens when the shortest paths between the pairs of sources/destinations share the same SRLG group.
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