Patent ID: 8773998

Claim:
A method comprising: receiving an error message generated in response to determining that accommodating a new higher priority reservation would exceed available unallocated resources, the error message being associated with an existing aggregate reservation of resources in a data network, wherein the existing aggregate reservation is associated with a plurality of reservations and the error message indicates that part of the resources of the existing aggregate reservation is being preempted by the new higher priority reservation, the new higher priority reservation having a priority that is higher than the priority of the existing aggregate reservation, and wherein the error message includes information indicating an amount of resources available for the existing aggregate reservation based on a difference between the amount of resources allocated to the existing aggregate reservation before preemption and the amount of resources that are allocated to the new higher priority reservation; selecting one or more reservations in the plurality of reservations associated with the existing aggregate reservation; and generating a teardown message for each of the selected reservations.