1. In a device, in a network, a method of providing a policy to a traffic partition in the network, the method comprising: providing a request for the policy from a policy server; receiving the policy from the policy server, the policy indicating processing to be applied to the traffic partition passing through the device; configuring the policy within a routing structure associated with the traffic partition for the policy in the device; and routing a stream of traffic for the routing structure in accordance with the policy for that routing structure.