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CSPF - The TE Algorithm

Hello Everyone, Today I thought of sharing with you some understanding on CSPF Algorithm. CSPF stands for Constraint Shortest Path First. This constraint-based routing is executed online by Ingress Router. The CSPF calculates an optimum explicit route (ER), based on specific constraints. The path is computed using traffic engineering database which takes the extensions of OSPF and IS-IS as input. The resulting route is then used by RSVP-TE. The CSPF in particular and any constraint based routing process requires following inputs: Bandwidth requirements Hop limitations Administr... [More]