公开(公告)号：US20230043675A1

公开(公告)日：2023-02-09

申请号：US17392352

申请日：2021-08-03

Applicant: Cisco Technology, Inc.

Inventor： Tong Liu ,  Isha Girdhar ,  Rutuja Pravin Kharche ,  Priyadarshini Anand

IPC: H04L12/721 ,  H04L12/715 ,  H04L12/751 ,  H04L12/707

Abstract: In one embodiment, a first path computation element (PCE) receives a request from a gateway for service chain functions (SFs) to be applied to a traffic flow, wherein a first subset of the SFs is located in a first zone. The first PCE identifies a boundary node located at a border between the first zone and a second zone where a second subset of the SFs are located. The first PCE sends a response to the gateway indicating a path within the first zone between the gateway and the boundary node to apply the first subset of SFs to the flow. The first PCE provides information regarding the flow and the boundary node to a second PCE that uses the information to configure the boundary node to route the flow in the second zone to apply the second subset of SFs to the flow.

公开(公告)号：US11968120B2

公开(公告)日：2024-04-23

申请号：US17392352

申请日：2021-08-03

Applicant: Cisco Technology, Inc.

Inventor： Tong Liu ,  Isha Girdhar ,  Rutuja Pravin Kharche ,  Priyadarshini Anand

IPC: H04L45/00 ,  H04L45/02 ,  H04L45/24 ,  H04L45/645

CPC classification number: H04L45/38 ,  H04L45/02 ,  H04L45/04 ,  H04L45/24 ,  H04L45/645

Abstract: In one embodiment, a first path computation element (PCE) receives a request from a gateway for service chain functions (SFs) to be applied to a traffic flow, wherein a first subset of the SFs is located in a first zone. The first PCE identifies a boundary node located at a border between the first zone and a second zone where a second subset of the SFs are located. The first PCE sends a response to the gateway indicating a path within the first zone between the gateway and the boundary node to apply the first subset of SFs to the flow. The first PCE provides information regarding the flow and the boundary node to a second PCE that uses the information to configure the boundary node to route the flow in the second zone to apply the second subset of SFs to the flow.