公开(公告)号：US20180048568A1

公开(公告)日：2018-02-15

申请号：US15792615

申请日：2017-10-24

Applicant: Cisco Technology, Inc.

Inventor： Ayan Banerjee ,  Sameer Merchant ,  Ramana Mellacheruvu ,  Ramesh V.N. Ponnapalli ,  Srinivasan Ramabadran

IPC: H04L12/741 ,  H04W72/00 ,  H04L12/761 ,  H04L12/801 ,  H04L12/721 ,  H04W28/12 ,  H04L12/58 ,  H04L12/745

CPC classification number: H04L45/745 ,  H04L45/16 ,  H04L45/72 ,  H04L45/748 ,  H04L47/33 ,  H04L51/10 ,  H04W28/12 ,  H04W72/005

Abstract: Various embodiments are disclosed for increasing Layer-3 LPM (longest prefix match) routing database in a network platform. In some embodiments, chipsets in fabric modules (FMs) can be partitioned into multiple banks. Network traffic can be directed towards a corresponding bank in the FMs by using a LPM table on a line card (LC). Entries in the LPM table on the LC can be programmed either statically or dynamically based upon LPM routes that are dynamically learned.

公开(公告)号：US09742673B2

公开(公告)日：2017-08-22

申请号：US14477244

申请日：2014-09-04

Applicant: Cisco Technology, Inc.

Inventor： Ayan Banerjee ,  Srinivasan Ramabadran ,  Mehak Mahajan ,  Raghava Sivaramu ,  Nataraj Bacthu ,  Raja Rao Tadimeti ,  Madhava Rao Cheethirala ,  Ramana Mellacheruvu

IPC: H04H20/71 ,  H04L12/741 ,  H04L12/58 ,  H04W28/12 ,  H04W72/00 ,  H04L12/721 ,  H04L12/801 ,  H04L12/761 ,  H04L12/745

CPC classification number: H04L45/745 ,  H04L45/16 ,  H04L45/72 ,  H04L45/748 ,  H04L47/33 ,  H04L51/10 ,  H04W28/12 ,  H04W72/005

Abstract: A plurality of line cards with each line card having a respective network forwarding engine and a respective outgoing interface (OIF) list and at least one fabric module communicatively coupled with each line card with each fabric module can have a respective network forwarding engine. The local OIF list can be asymmetrically programmed. The network forwarding engine of a line card can be configured to receive a multicast packet, compare a multicast address associate with the received multicast packet with entries in the local OIF list of the line card and forward the received multicast packet to at least one interface associated with the multicast address in response to the comparison resulting in a match.

公开(公告)号：US20190207845A1

公开(公告)日：2019-07-04

申请号：US16297171

申请日：2019-03-08

Applicant: Cisco Technology, Inc.

Inventor： Malick Mohamed Usman ,  Srinivasan Ramabadran ,  Raghava Sivaramu ,  Sriram Srinivasan ,  Srini Ananthakrishnan

IPC: H04L12/707 ,  H04L12/721 ,  H04L12/46

CPC classification number: H04L45/24 ,  H04L12/4633 ,  H04L45/124 ,  H04L45/50

Abstract: Disclosed are systems and methods for scaling Massively Scalable Data Center (MSDC) networks with a large number of end-point tunnels utilizing Equal-cost multi-path routing (ECMP). The systems and methods can use the NO-OP label operations to maintain single ECMP objects to switch a set of segment routing tunnels that share the same ECMP links. The forwarding engine can determine the use of the NO-OP label operation and update a received packet to enable the use of the single ECMP objects of the set of segment routing tunnels.

公开(公告)号：US10250399B1

公开(公告)日：2019-04-02

申请号：US14734987

申请日：2015-06-09

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Ayan Banerjee ,  Raghava K. Sivaramu ,  Srinivasan Ramabadran ,  Mehak Mahajan ,  Nataraj Bacthu

IPC: H04L12/18 ,  H04L12/931 ,  H04L12/741

Abstract: In accordance with one example embodiment, a system configured for programming a network layer multicast address entry in a routing table of an ingress line card module is disclosed. The network layer multicast address entry includes a network layer address associated with at least one egress line card. The system is further configured for programming a data link layer multicast routing address entry in a routing table of a fabric card module in which the data link layer multicast routing address entry corresponds to the network layer multicast address entry.

公开(公告)号：US20180026874A1

公开(公告)日：2018-01-25

申请号：US15217819

申请日：2016-07-22

Applicant: Cisco Technology, Inc.

Inventor： Malick Mohamed Usman ,  Srinivasan Ramabadran ,  Raghava Sivaramu ,  Sriram Srinivasan ,  Srini Ananthakrishnan

IPC: H04L12/707 ,  H04L12/721 ,  H04L12/46

CPC classification number: H04L45/24 ,  H04L12/4633 ,  H04L45/124

Abstract: Disclosed are systems and methods for scaling Massively Scalable Data Center (MSDC) networks with a large number of end-point tunnels utilizing Equal-cost multi-path routing (ECMP). The systems and methods can use the NO-OP label operations to maintain single ECMP objects to switch a set of segment routing tunnels that share the same ECMP links. The forwarding engine can determine the use of the NO-OP label operation and update a received packet to enable the use of the single ECMP objects of the set of segment routing tunnels.

公开(公告)号：US20210399908A1

公开(公告)日：2021-12-23

申请号：US17465822

申请日：2021-09-02

Applicant: Cisco Technology, Inc.

Inventor： Ayan Banerjee ,  Raghava K. Sivaramu ,  Srinivasan Ramabadran ,  Mehak Mahajan ,  Nataraj Batchu

IPC: H04L12/18 ,  H04L12/761

Abstract: In accordance with one example embodiment, a system configured for programming a network layer multicast address entry in a routing table of an ingress line card module is disclosed. The network layer multicast address entry includes a network layer address associated with at least one egress line card. The system is further configured for programming a data link layer multicast routing address entry in a routing table of a fabric card module in which the data link layer multicast routing address entry corresponds to the network layer multicast address entry.

公开(公告)号：US10659346B2

公开(公告)日：2020-05-19

申请号：US16297171

申请日：2019-03-08

Applicant: Cisco Technology, Inc.

Inventor： Malick Mohamed Usman ,  Srinivasan Ramabadran ,  Raghava Sivaramu ,  Sriram Srinivasan ,  Srini Ananthakrishnan

IPC: H04L12/28 ,  H04L12/707 ,  H04L12/46 ,  H04L12/721 ,  H04L12/723

Abstract: Disclosed are systems and methods for scaling Massively Scalable Data Center (MSDC) networks with a large number of end-point tunnels utilizing Equal-cost multi-path routing (ECMP). The systems and methods can use the NO-OP label operations to maintain single ECMP objects to switch a set of segment routing tunnels that share the same ECMP links. The forwarding engine can determine the use of the NO-OP label operation and update a received packet to enable the use of the single ECMP objects of the set of segment routing tunnels.

公开(公告)号：US09634927B1

公开(公告)日：2017-04-25

申请号：US14657093

申请日：2015-03-13

Applicant: Cisco Technology, Inc.

Inventor： Hardeep Singh ,  Srinivasan Ramabadran ,  Raghava Sivaramu ,  Mahesh Mariappa Krishnappa

IPC: H04L12/28 ,  H04L12/721 ,  H04L12/713

CPC classification number: H04L45/745 ,  H04L12/4641

Abstract: A hierarchical lookup forwarding model to induce a Layer (L2) forwarding look up in a post-routed virtual local area network (VLAN). In one example, a line card of a networking device receives a packet for routing from a first virtual local VLAN to a second VLAN. The line card determines that the packet is associated with a host route having a corresponding incomplete Layer 3 (L3) adjacency. The line card steers the packet to a fabric module of the networking device. The fabric module performs an L2 lookup on the packet and floods the packet to one or more of line cards of the networking devices. The one or more line cards flood the packet on a plurality of external ports of the networking device.

公开(公告)号：US12107695B2

公开(公告)日：2024-10-01

申请号：US17465822

申请日：2021-09-02

Applicant: Cisco Technology, Inc.

Inventor： Ayan Banerjee ,  Raghava K. Sivaramu ,  Srinivasan Ramabadran ,  Mehak Mahajan ,  Nataraj Batchu

IPC: H04L12/18 ,  H04L45/16 ,  H04L45/745 ,  H04L49/201

CPC classification number: H04L12/18 ,  H04L45/16 ,  H04L45/745 ,  H04L49/201

Abstract: In accordance with one example embodiment, a system configured for programming a network layer multicast address entry in a routing table of an ingress line card module is disclosed. The network layer multicast address entry includes a network layer address associated with at least one egress line card. The system is further configured for programming a data link layer multicast routing address entry in a routing table of a fabric card module in which the data link layer multicast routing address entry corresponds to the network layer multicast address entry.

公开(公告)号：US10333828B2

公开(公告)日：2019-06-25

申请号：US15216651

申请日：2016-07-21

Applicant: Cisco Technology, Inc.

Inventor： Nataraj Bacthu ,  Raghava Sivaramu ,  Srinivasan Ramabadran ,  Terry Fangcheng Tang ,  Lenin Babu Dontuboyina

IPC: H04L12/761 ,  H04L12/46 ,  H04L12/721 ,  H04L12/931 ,  H04L12/18

Abstract: Aspects of the subject technology relate to systems for arbitrating direct forwarder (“DF”) instantiation between VPC peers used to facilitating the transport of bidirectional multicast traffic over a L2/L3 network boundary. In some aspects, arbitration of DF instantiation on a given VPC peer can include determining a first set of metrics for a first VPC switch, determining a second set of metrics for a second VPC switch, and determining, at the first VPC switch, whether to instantiate a designated forwarder (DF) operation based on a comparison of the first set of metrics and the second set of metrics. Methods and machine-readable media are also provided.