公开(公告)号：US20250106150A1

公开(公告)日：2025-03-27

申请号：US18472011

申请日：2023-09-21

Applicant: Cisco Technology, Inc.

Inventor： Avinash Shah ,  Pritam Baruah ,  Amjad Inamdar ,  Laxmikantha Reddy Ponnuru ,  Latika Ahuja ,  Jai Prakash Agrawal

IPC: H04L45/00 ,  H04L9/40

Abstract: A system facilitates communication between branches of an SD-WAN and a service chain element. A hub node receives a data packet of a flow from a source branch over a VPN segment to be transmitted to a destination branch, extracts flow information from the data packet including VPN segment information to be stored in a flow table before transmitting the data packet to the service chain element over a service chain VPN. Upon return of the data packet from the service chain element, the hub node uses packet tuple information to retrieve the flow information with VPN segment information from the flow table. The hub node can then forward the data packet to the destination branch over the VPN segment. The hub node can generate and store an Auto Service Chaining Key that connects bidirectional flows so that the hub node can apply service-chaining to bidirectional traffic.

公开(公告)号：US20250106149A1

公开(公告)日：2025-03-27

申请号：US18471931

申请日：2023-09-21

Applicant: Cisco Technology, Inc.

Inventor： Avinash Shah ,  Pritam Baruah ,  Amjad Inamdar ,  Laxmikantha Reddy Ponnuru ,  Latika Ahuja ,  Jai Prakash Agrawal

IPC: H04L45/00 ,  H04L9/40 ,  H04L45/745

Abstract: A system facilitates communication between branches of an SD-WAN and a service chain element. A hub node receives a data packet of a flow from a source branch over a VPN segment to be transmitted to a destination branch, extracts flow information from the data packet including VPN segment information to be stored in a flow table before transmitting the data packet to the service chain element over a service chain VPN. Upon return of the data packet from the service chain element, the hub node uses packet tuple information to retrieve the flow information with VPN segment information from the flow table. The hub node can then forward the data packet to the destination branch over the VPN segment. The hub node can generate and store an Auto Service Chaining Key that connects bidirectional flows so that the hub node can apply service-chaining to bidirectional traffic.