公开(公告)号：US10608924B2

公开(公告)日：2020-03-31

申请号：US16042870

申请日：2018-07-23

Applicant: Cisco Technology, Inc.

Inventor： Padmanab Pathikonda ,  Rishi Chhibber ,  Roshan Lal ,  Ann Roshini Paul ,  Anand Kumar Singh ,  Nataraj Batchu

IPC: H04L12/761 ,  H04L12/753

Abstract: In one illustrative example, an IP network media data router includes a spine and leaf switch architecture operative to provide IP multicast delivery of media data from source devices to receiver devices without the overhead communication with a controller. The architecture can include K spine switches, K sets of L leaf switches, M data links between each leaf switch, and a plurality of bidirectional data ports connected to each leaf switch for a guaranteed non-blocking IP multicast delivery of data. A deterministic hash function a used on both the first hop router and the last hop router to ensure the same spine node is selected for flow stitching. Accordingly, without the extra communication with a centralized controller, the right spine for establishing a multicast flow can be chosen using the deterministic hash function and the distributed resource information stored on each node.

公开(公告)号：US10454698B1

公开(公告)日：2019-10-22

申请号：US15792654

申请日：2017-10-24

Applicant: Cisco Technology, Inc.

Inventor： Ayan Banerjee ,  Ann Roshini Paul ,  Srinivasan Ramabadran ,  Chandrasekhar V Modumudi ,  Rahul Parameswaran

IPC: H04L12/18 ,  H04L12/54 ,  H04W72/00 ,  H04L12/46 ,  H04L12/715

Abstract: In one illustrative example, an IP network media data router includes a spine and leaf switch architecture operative to provide IP multicast delivery of media data from source devices to receiver devices. The architecture may include K spine switches, K sets of L leaf switches, M data links between each leaf switch and each spine switch where each data link has a maximum link bandwidth of BWL, and a plurality of bidirectional data ports connected to each leaf switch. Notably, the router is provided or specified with a number of bidirectional data ports N=(a/K)×(BWL/BWP) for a guaranteed non-blocking IP multicast delivery of data at a maximum port bandwidth of BWP, where “a” is a fixed constant greater than or equal to K. The architecture may be reconfigurable or expandable to include C additional spine switches and C additional sets of L leaf switches. The reconfiguration may provide for a redistribution or reconnection of the M data links, so that the new number of M data links between each leaf switch and each spine switch is Mnew=(Kold×Mold)/(Kold+C)=a/Knew. The reconfiguration provides a new maximum number of bidirectional data ports as Nnew=(a/Knew)×(BWL/BWP) for maintaining the non-blocking IP multicast delivery of data at a maximum port bandwidth of BWP.