Methods, computer-readable media and devices are disclosed for caching traffic of a transmission in a storage resource of a storage area network when a route for the transmission fails to satisfy a latency requirement. For example, a processor may receive a latency requirement for a transmission via a communications network, select a route for the transmission through the communications network, submit to a storage area network a request for a storage resource for the transmission and receive from the storage area network a notification of a storage resource of the storage area network assigned to the transmission. When the route fails to satisfy the latency requirement, the processor may cache traffic of the transmission in the storage resource.