公开(公告)号：US20170353382A1

公开(公告)日：2017-12-07

申请号：US15173951

申请日：2016-06-06

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Shishir Gupta ,  Dharmarajan Subramanian ,  Javed Asghar

IPC: H04L12/703 ,  H04L12/707 ,  H04L12/761 ,  H04L12/801 ,  H04L12/18

CPC classification number: H04L45/28 ,  H04L12/18 ,  H04L12/1863 ,  H04L12/1886 ,  H04L45/128 ,  H04L45/16 ,  H04L45/22

Abstract: In one embodiment, a method includes computing at a controller, a primary path and a backup path for transmittal of multicast data from service nodes in communication with the controller and a multicast source to access nodes in communication with multicast receivers, and transmitting from the controller, information for the primary path and the backup path to the access nodes for use by the access nodes in receiving the multicast data on the primary path and the backup path, and switching transmittal of the multicast data to the multicast receivers from the primary path to the backup path upon identifying a failure in the primary path to provide fast reroute at the access nodes. A multicast control plane runs in the controller without operating in the access nodes. An apparatus is also disclosed herein.

公开(公告)号：US09825778B2

公开(公告)日：2017-11-21

申请号：US14870722

申请日：2015-09-30

Applicant: Cisco Technology, Inc.

Inventor： James N. Guichard ,  Paul Quinn ,  Javed Asghar ,  Reinaldo Penno ,  Yixing Ruan ,  Carlos M. Pignataro

IPC: G01R31/08 ,  H04L12/28 ,  H04J3/16 ,  H04L12/46 ,  H04L29/06

CPC classification number: H04L12/4633 ,  H04L63/0272

Abstract: A method for applying network services to data traffic forwarded between virtual private network (VPN) sites includes: receiving a data packet addressed to a target site associated with the VPN, determining services to be applied to the data packet according to a service chain, where the determining is a function of at least one of the VPN, the origin site or the target site, adding an indication of a VPN forwarding context onto the data packet, encapsulating the data packet with Network Service Header encapsulation, where a header for the encapsulated data packet indicates at least the service chain; forwarding the encapsulated data packet in accordance with the service chain, receiving the encapsulated data packet at the end of the service chain, terminating the service chain, removing the encapsulation, and forwarding the data packet to a target destination per the indication of a VPN forwarding context.