A method in a traffic monitor in a communications network, the method comprising: responsive to a notification that content is being delivered to a device from a content delivery network according to a data transfer policy, the notification including an indication of the data transfer policy, monitoring delivery of the content from the content delivery network to the device, wherein the data transfer policy indicates a data rate, a content quality, a maximum data rate or a maximum content quality for transfer of the content from the content delivery network to the device; responsive to a detection that the delivery of the content violates the data transfer policy, performing a notification action, wherein performing the notification action comprises sending an alarm notification to a node in the communications network, and/or notifying an enforcement entity to enforce the data transfer policy for the delivery of the content from the content delivery network to the device; and responsive to a request by the device to receive the content from the content delivery network according to the data transfer policy, sending a redirection instruction to the device redirecting the device to the content delivery network, wherein the redirection instruction includes an indication of the data transfer policy, and wherein the request to receive the content from the content delivery network comprises a request for a manifest associated with the content, and wherein the manifest is associated with the content provided to the device and the manifest identifies only those quality levels that comply with the data transfer policy, and that the device cannot request quality levels that do not comply with the policy. responsive to a notification that content is being delivered to a device from a content delivery network according to a data transfer policy, the notification including an indication of the data transfer policy, monitoring delivery of the content from the content delivery network to the device, wherein the data transfer policy indicates a data rate, a content quality, a maximum data rate or a maximum content quality for transfer of the content from the content delivery network to the device; responsive to a detection that the delivery of the content violates the data transfer policy, performing a notification action, wherein performing the notification action comprises sending an alarm notification to a node in the communications network, and/or notifying an enforcement entity to enforce the data transfer policy for the delivery of the content from the content delivery network to the device; and responsive to a request by the device to receive the content from the content delivery network according to the data transfer policy, sending a redirection instruction to the device redirecting the device to the content delivery network, wherein the redirection instruction includes an indication of the data transfer policy, and wherein the request to receive the content from the content delivery network comprises a request for a manifest associated with the content, and wherein the manifest is associated with the content provided to the device and the manifest identifies only those quality levels that comply with the data transfer policy, and that the device cannot request quality levels that do not comply with the policy.