公开(公告)号：US20240291756A1

公开(公告)日：2024-08-29

申请号：US18656479

申请日：2024-05-06

Applicant: Cisco Technology, Inc.

Inventor： Rajagopalan Janakiraman ,  Suresh Pasupula ,  Manju Ramesh ,  Christophe Paggen ,  Huyen Trung Duong ,  Lukas Krattiger

IPC: H04L45/745 ,  H04L45/24 ,  H04L45/42 ,  H04L61/5007

CPC classification number: H04L45/745 ,  H04L45/24 ,  H04L45/42 ,  H04L61/5007

Abstract: Techniques for using more-specific routing to perform scalable Layer-2 (L2) stretching of subnets across hybrid-cloud environments. Routing tables in a public cloud may allow for routes that are more specific than the default local route, and the more-specific routes may be used to send all traffic to a dedicated, cloud router. The more-specific routes are set up for a VPC where a subnet resides such that the more specific-routes cover at least a portion of subnet range. The next hop for the more-specific routes point to the cloud router which is capable of doing host routing and segmentation extension. Thus, traffic originating from endpoints in a VPC is routed to the cloud router, and the cloud router determines whether the traffic is to be re-routed back to a destination endpoint in the VPC (or another cloud location), or sent to a destination endpoint residing in the on-premises site.

公开(公告)号：US11582100B2

公开(公告)日：2023-02-14

申请号：US17719792

申请日：2022-04-13

Applicant: Cisco Technology, Inc.

Inventor： Rajagopalan Janakiraman ,  Sivakumar Ganapathy ,  Gianluca Mardente ,  Giovanni Meo ,  Patel Amitkumar Valjibhai

IPC: G06F15/177 ,  H04L41/0816 ,  H04L12/46 ,  H04L41/0806 ,  H04L41/0893 ,  H04L45/02 ,  H04L45/44

Abstract: Technologies for multi-cloud routing and policy interconnectivity are provided. An example method can include assigning different sets of data plane routers to data plane traffic associated with different address spaces in a cloud site of a multi-cloud fabric to yield a distributed mapping of data plane traffic and data plane routers. The method can further include providing, to an on-premises site in the multi-cloud fabric, routing entries from a control plane router on the cloud site, the routing entries reflecting the distributed mapping and identifying, for each address space, which data plane router handles data plane traffic for that address space; and when a data plane router is deployed at the cloud site, providing, to the on-premises site, updated routing information from the control plane router, the updated routing information identifying the data plane router as a next hop for data plane traffic associated with a respective address space.

公开(公告)号：US20210266256A1

公开(公告)日：2021-08-26

申请号：US16801500

申请日：2020-02-26

Applicant: Cisco Technology, Inc.

Inventor： Rajagopalan Janakiraman ,  Sivakumar Ganapathy ,  Javed Asghar ,  Azeem Muhammad Suleman

IPC: H04L12/741 ,  H04L29/08 ,  H04L12/26 ,  H04L29/12

Abstract: Techniques for routing data packets through service chains within and between public cloud networks of multi-cloud fabrics. A router in a network, e.g., a public cloud network, receives data packets from nodes in the network through segments of the network. Based at least in part on (i) a source address of the data packet, (ii) a destination address of the data packet, and (iii) an identity of the segments of the network from which the data packets are received, the router determines a next node in the network to which the data packet is to be forwarded. The router may then forward the data packet through another segment of the network to the next node and then receive the data packet from the next node through the another segment.

公开(公告)号：US10574481B2

公开(公告)日：2020-02-25

申请号：US16042265

申请日：2018-07-23

Applicant: Cisco Technology, Inc.

Inventor： Rajagopalan Janakiraman ,  Ronak Desai ,  Kalyan Ghosh ,  Balaji Muthuvarathan

IPC: H04L12/46 ,  H04L12/933 ,  H04L12/947 ,  H04L12/931 ,  H04L29/12

Abstract: Heterogeneous capabilities in an overlay fabric may be provided. First, it may be determined that a first link and a second link support a feature. Then the first link and the second link may be traversed with traffic between a host in a first Endpoint Group (EPG) connected to a first leaf switch and a second host in a second EPG connected to a second leaf switch when a topology preference for the feature is indicated for the traffic.

公开(公告)号：US10348646B2

公开(公告)日：2019-07-09

申请号：US15585202

申请日：2017-05-03

Applicant: Cisco Technology, Inc.

Inventor： Rajagopalan Janakiraman ,  Shyam Kapadia ,  Nilesh Shah ,  Chia Tsai ,  Vinay Parameswarannair

IPC: H04L12/28 ,  H04L12/947 ,  H04L12/933 ,  H04L12/743 ,  H04L12/741 ,  H04L12/721

Abstract: In some embodiments, a data packet may be received at a leaf switch. A port-channel associated with a destination port for the data packet may be identified, and the data packet may be transmitted to the destination port via the identified port-channel.

公开(公告)号：US09680751B2

公开(公告)日：2017-06-13

申请号：US14709125

申请日：2015-05-11

Applicant: Cisco Technology, Inc.

Inventor： Rajagopalan Janakiraman ,  Pags Krishnamoorthy ,  Sridhar Subramanian ,  Venkataraman Natham

IPC: H04L12/801 ,  H04L12/721 ,  H04L12/803 ,  H04L29/08

CPC classification number: H04L47/10 ,  H04L45/38 ,  H04L45/66 ,  H04L47/125 ,  H04L67/1023

Abstract: The methods and devices discussed herein provide service clustering within a TRILL network without relying on an additional service insertion framework. A TRILL network can include one or more flow distribution RBridges for distributing flows to service nodes. Each flow distribution RBridge can have a virtual base identifier and one or more virtual cluster identifiers. An example method can include maintaining service cluster load balancing structures and receiving a packet that is encapsulated with an inner header and an outer header. The method can include determining whether the egress RBridge identifier is a virtual cluster identifier, and if so, selecting a service node from one of the service cluster load balancing structures. The method can include forwarding the packet to the selected service node.

公开(公告)号：US09531564B2

公开(公告)日：2016-12-27

申请号：US14155493

申请日：2014-01-15

Applicant: Cisco Technology, Inc.

Inventor： Rajagopalan Janakiraman ,  Anupama Ashok Lolage ,  Pags Krishnamoorthy ,  Sanjay Kumar Hooda ,  Nalinaksh M. Pai

IPC: H04L12/741 ,  H04L12/733 ,  H04L12/46 ,  H04L12/715 ,  H04L12/721

CPC classification number: H04L12/4633 ,  H04L12/4641 ,  H04L45/64 ,  H04L45/66

Abstract: Methods and systems are provided for detecting overlay end points which are a single physical hop away and employing a simplified overlay header instead of a regular overlay header for communications with the identified end points. The simplified overlay header may carry overlay protocol related forwarding and peer information and may be designed to carry locally significant forwarding information which avoids overlay lookup related overhead on encapsulation and decapsulation operations. The simplified overlay header may be handled in the same forwarding pipeline pass as the handling of the inner frame and may work across different forwarding engines. Upon detection of a single hop link/keepalive failure, the backup overlay (original overlay header) may be used for forwarding.

Abstract translation: 提供了用于检测作为单个物理跳越的重叠端点的方法和系统，并且采用简化的覆盖报头而不是用于与所识别的端点进行通信的常规覆盖报头。 简化的覆盖报头可以携带覆盖协议相关的转发和对等信息，并且可以被设计为承载本地有效的转发信息，这避免了在封装和解封装操作上的覆盖查找相关开销。 简化的覆盖报头可以处理在与内部帧的处理相同的转发流水线中，并且可以跨不同的转发引擎工作。 在检测到单跳链路/保活性故障时，可以使用备份覆盖（原始覆盖报头）进行转发。

公开(公告)号：US20160099858A1

公开(公告)日：2016-04-07

申请号：US14967669

申请日：2015-12-14

Applicant: Cisco Technology, Inc.

Inventor： Rajagopalan Janakiraman ,  Yibin Yang ,  Pags Krishnamoorthy ,  Padmanabhan Krishnan

IPC: H04L12/26 ,  H04L12/24

CPC classification number: H04L43/18 ,  H04L41/12 ,  H04L43/00 ,  H04L43/08 ,  H04L43/12

Abstract: A monitoring session associated with a virtual nickname may be established in a TRILL network. A monitoring station may be connected to an edge switch of the TRILL network specifying the virtual nickname for the monitoring session. The monitoring station is set as a destination for the monitoring session and the virtual nickname is flooded throughout the TRILL network. A source may then be configured to the monitoring session by specifying the virtual nickname of the monitoring session without knowing the destination tied to the monitoring session. Network traffic through the source may then be forwarded to the destination tied to the monitoring session.

Abstract translation: 可以在TRILL网络中建立与虚拟昵称相关联的监视会话。 监控站可以连接到TRILL网络的边缘交换机，指定监视会话的虚拟昵称。 监控站被设置为监视会话的目的地，虚拟昵称在整个TRILL网络中泛滥。 然后，可以通过在不知道与监视会话相关联的目的地的情况下指定监视会话的虚拟昵称来将源配置为监视会话。 然后可以将通过源的网络流量转发到与监视会话相关联的目的地。

公开(公告)号：US09215147B2

公开(公告)日：2015-12-15

申请号：US13942426

申请日：2013-07-15

Applicant: Cisco Technology, Inc.

Inventor： Rajagopalan Janakiraman ,  Yibin Yang ,  Pags Krishnamoorthy ,  Padmanabhan Krishnan

IPC: H04L12/24 ,  H04L12/26

CPC classification number: H04L43/18 ,  H04L41/12 ,  H04L43/00 ,  H04L43/08 ,  H04L43/12

Abstract: A monitoring session associated with a virtual nickname may be established in a TRILL network. A monitoring station may be connected to an edge switch of the TRILL network specifying the virtual nickname for the monitoring session. The monitoring station is set as a destination for the monitoring session and the virtual nickname is flooded throughout the TRILL network. A source may then be configured to the monitoring session by specifying the virtual nickname of the monitoring session without knowing the destination tied to the monitoring session. Network traffic through the source may then be forwarded to the destination tied to the monitoring session.

Abstract translation: 可以在TRILL网络中建立与虚拟昵称相关联的监视会话。 监控站可以连接到TRILL网络的边缘交换机，指定监视会话的虚拟昵称。 监控站被设置为监视会话的目的地，虚拟昵称在整个TRILL网络中泛滥。 然后，可以通过在不知道与监视会话相关联的目的地的情况下指定监视会话的虚拟昵称来将源配置为监视会话。 然后可以将通过源的网络流量转发到与监视会话相关联的目的地。

公开(公告)号：US20150200848A1

公开(公告)日：2015-07-16

申请号：US14155493

申请日：2014-01-15

Applicant: Cisco Technology, Inc.

Inventor： Rajagopalan Janakiraman ,  Anupama Ashok Lolage ,  Pags Krishnamoorthy ,  Sanjay Kumar Hooda ,  Nalinaksh M. Pai

IPC: H04L12/741 ,  H04L12/733

CPC classification number: H04L12/4633 ,  H04L12/4641 ,  H04L45/64 ,  H04L45/66

Abstract: Methods and systems are provided for detecting overlay end points which are a single physical hop away and employing a simplified overlay header instead of a regular overlay header for communications with the identified end points. The simplified overlay header may carry overlay protocol related forwarding and peer information and may be designed to carry locally significant forwarding information which avoids overlay lookup related overhead on encapsulation and decapsulation operations. The simplified overlay header may be handled in the same forwarding pipeline pass as the handling of the inner frame and may work across different forwarding engines. Upon detection of a single hop link/keepalive failure, the backup overlay (original overlay header) may be used for forwarding.

Abstract translation: 提供了用于检测作为单个物理跳越的重叠端点的方法和系统，并且采用简化的覆盖报头而不是用于与所识别的端点进行通信的常规覆盖报头。 简化的覆盖报头可以携带覆盖协议相关的转发和对等信息，并且可以被设计为承载本地有效的转发信息，这避免了在封装和解封装操作上的覆盖查找相关开销。 简化的覆盖报头可以处理在与内部帧的处理相同的转发流水线中，并且可以跨不同的转发引擎工作。 在检测到单跳链路/保活性故障时，可以使用备份覆盖（原始覆盖报头）进行转发。