CSPF meaning in Networking ?

Answer: What is Constrained Shortest Path First mean?

Constrained Shortest Path First (CSPF) is an extension of shortest path algorithms. The path computed using CSPF is a shortest path fulfilling a set of constraints. It simply means that it runs shortest path algorithm after pruning those links that violate a given set of constraints. A constraint could be minimum bandwidth required per link (also known as bandwidth guaranteed constraint), end-to-end delay, maximum number of links traversed, include/exclude nodes. CSPF is widely used in MPLS Traffic Engineering. The routing using CSPF is known as Constraint Based Routing (CBR).

The path computed using CSPF could be exactly same as that of computed from OSPF and IS-IS, or it could be completely different depending on the set of constraints to be met.

reference

Full Form	Category
Centre for Studies of Physical Function	Academic & Science
Civil Society Policy Forum	Academic & Science
Corporate Strategy and Program Framework	Business
California State Parks Foundation	Community
Charter School Performance Framework	Community
Cisco Secure Pix Firewall	Computing
Cooling Seasonal Performance Factor	General
Constraint Shortest Path First	General
Constrained Shortest Path First	Networking
Cmu/stanford Packet Filter	Networking
Civil Service Provident Fund	Stock Exchange
Central States Pension Fund	Stock Exchange