Inter-domain SDN traffic engineering

摘要

Constraining resource provisioning by domain controllers based on resource requirements projected for remotely-originating inter-domain traffic can improve utilization efficiency and link reliability in multi-domain software defined network (SDN) architectures. A domain controller may be required to reserve a portion of inter-domain link capacity for transporting remotely-originating traffic. This may limit the inter-domain link capacity available for transporting locally-originating traffic in a manner that ensures remotely-originating traffic flows have equitable and/or adequate access to resources of inter-domain links. Alternatively, a domain controller may be required to maintain a minimum throughput rate for remotely-originating traffic, which may cause remotely-originating traffic to be prioritized over locally-originating traffic when necessary to maintain the minimum throughput rate. Provisioning constraints can be generated in a centralized or distributed fashion.

主权项

1. A method for resource provisioning in software defined networking (SDN) architectures, the method comprising:
receiving, by an inter-domain traffic engineering (TE) controller, border element information from multiple SDN controllers, the multiple SDN controllers being assigned to different domains of a network; computing, by the inter-domain TE controller, inter-domain allocation constraints in accordance with the border element information; and sending, by the inter-domain TE controller, the inter-domain allocation constraints to at least a first SDN controller in the multiple SDN controllers, the first SDN controller being assigned to a first domain of the network, wherein the first domain is connected to a second domain of the network via one or more inter-domain links, and wherein the inter-domain allocation constraints are configured to reserve resources on the one or more inter-domain links for inter-domain traffic originating from outside the first domain.