The invention discloses
wide area network bandwidth
classification methods, devices and
system. According to a method, a first
provider edge obtains a message sent by a first
customer edge, identifiesan application corresponding to the message, and packages a forwarding
label stack corresponding to the application for the message; the forwarding
label stack is issued to the first
provider edge byan SDN (
Software Defined Network) controller; the first
provider edge forwards the message to a next hop provider edge according to a
label in the forwarding label stack; and after the next hop provider edge receives the message, the next hop provider edge forwards the message according to the label in the forwarding label stack, until the message is forwarded to a second
customer edge. Accordingto the methods, the devices and the
system, a segmented routing and application-based policy routing combined scheme is provided, application or business-
based wide area network bandwidth classification can be realized, different businesses of different customers can be forwarded according to different bandwidths or
delay polices, practical
business requirements of the customers are combined fully, bandwidth waste is avoided, and links are utilized fully.