1. A method comprising: receiving a request associated with initiating a communication session in a network, the request identifying a source endpoint and a destination endpoint of the communication session and a value of a computational resource associated with the communication session; determining a measure of the computational resource for at least one network element in a path from the source endpoint to the destination endpoint; applying at least one rule to determine whether to allow the communication session to be initiated at the value, wherein the at least one rule identifies values; and generating, based on the at least one rule, an instruction to initiate the communication session.