公开(公告)号：US11071005B2

公开(公告)日：2021-07-20

申请号：US16666904

申请日：2019-10-29

Applicant: Cisco Technology, Inc.

Inventor： Changhong Shen ,  Yu Zhang ,  Xiaorong Wang ,  Pu Duan

IPC: H04W28/02 ,  H04L12/725 ,  H04L12/715 ,  H04L12/851 ,  H04W36/30 ,  H04L12/801 ,  H04L12/24

Abstract: According to some embodiments, a method performed by a software defined wide area network (SD-WAN) controller in a SD-WAN network comprising a plurality of aggregation edge routers and a plurality of branch edge routers comprises the following steps. The method comprises: receiving, from each of the plurality of branch edge routers, a transmit location (TLOC) publication comprising a quality of service (QoS) attribute of one or more TLOCs configured on the branch edge router; determining a QoS policy based on the received TLOC publications; transmitting the QoS policy to the plurality of aggregation edge routers; receiving, from a branch edge router of the plurality of branch edge routers, a first congestion indication indicating that bandwidth utilization on a wide area network (WAN) interface of the branch edge router exceeds a first threshold; determining an updated QoS policy based on the received TLOC publications and the first congestion indication to reduce congestion at the branch edge router; and transmitting the updated QoS policy to the plurality of aggregation edge routers.