公开(公告)号：US20190116220A1

公开(公告)日：2019-04-18

申请号：US16218858

申请日：2018-12-13

Applicant: Cisco Technology, Inc.

Inventor： Ming Zhang ,  Chengelpet Ramesh

IPC: H04L29/08 ,  H04L12/751 ,  H04L12/931

Abstract: A distributed neighbor discovery module is disclosed where all neighbor discovery operations and functionalities may be distributed to a switch device processor. Each neighbor discovery process on a switch device may run as an individual neighbor discovery router node. There may be no coordination between neighbor discovery processes occurring on different switch devices. All other traffic, including both IPv6 control traffic and data traffic destined to the router may be processed by the central controller processor.

公开(公告)号：US10171547B2

公开(公告)日：2019-01-01

申请号：US14264101

申请日：2014-04-29

Applicant: Cisco Technology, Inc.

Inventor： Ming Zhang ,  Chengelpet Ramesh

IPC: G06F15/16 ,  H04L29/08 ,  H04L12/931 ,  H04L12/751 ,  H04L29/12

Abstract: A distributed neighbor discovery module is disclosed where all neighbor discovery operations and functionalities may be distributed to a switch device processor. Each neighbor discovery process on a switch device may run as an individual neighbor discovery router node. There may be no coordination between neighbor discovery processes occurring on different switch devices. All other traffic, including both IPv6 control traffic and data traffic destined to the router may be processed by the central controller processor.

公开(公告)号：US09106443B2

公开(公告)日：2015-08-11

申请号：US13661624

申请日：2012-10-26

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Yaonan Liang ,  Chengelpet V. Ramesh ,  Ganesh P. Murthy ,  Ming Zhang ,  Rajesh B. Nataraja

IPC: H04L12/46 ,  H04L12/743 ,  H04L12/751 ,  H04L12/741

CPC classification number: H04L12/4625 ,  H04L45/02 ,  H04L45/54 ,  H04L45/7457

Abstract: In one embodiment, a method includes receiving from a server, flow data for a plurality of flows at a network device, the flow data comprising for each flow, a destination address and a time indicating when a last packet was processed for the flow at the server, updating a flow table at the network device, identifying one of the flows in the flow table as an inactive flow, and removing a route for the inactive flow from a forwarding information base at the network device. An apparatus and logic are also disclosed herein.

Abstract translation: 在一个实施例中，一种方法包括从服务器接收在网络设备处的多个流的流数据，所述流数据包括针对每个流的目的地地址和指示何时处理最后一个分组的流程 服务器，更新网络设备处的流表，将流表中的一个流识别为非活动流，以及从网络设备的转发信息库中去除不活动流的路由。 本文还公开了一种装置和逻辑。

公开(公告)号：US20140328343A1

公开(公告)日：2014-11-06

申请号：US13888052

申请日：2013-05-06

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Shyam Kapadia ,  Chengelpet V. Ramesh ,  Ming Zhang

IPC: H04L12/56 ,  H04L12/741

CPC classification number: H04L45/741 ,  H04L45/66

Abstract: An example method for routing IPv6 link-local addresses in a network environment is provided and includes receiving a packet at a first switch from an attached first host in a virtual local area network (VLAN) associated with a virtual routing and forwarding (VRF) instance of a network environment, where the packet is destined to an Internet Protocol version 6 (IPv6) link-local address of a remote second host in the VLAN, and routing the packet at Layer 3 to a second switch, to which the second host is attached. In specific embodiments, the second switch routes the packet at Layer 3 to the second host if the VRF does not include duplicate IPv6 link-local addresses corresponding to the IPv6 link-local address of the second host; the second switch bridges the packet at Layer 2 to the second host if the VRF includes at least one duplicate IPv6 link-local address.

Abstract translation: 提供了用于在网络环境中路由IPv6链路本地地址的示例性方法，并且包括在与虚拟路由和转发（VRF）实例相关联的虚拟局域网（VLAN）中的附接第一主机的第一交换机处接收分组 的网络环境，其中分组去往VLAN中的远程第二主机的因特网协议版本6（IPv6）链路本地地址，并且将第3层的分组路由到第二主机所在的第二交换机 附上。 在具体实施例中，如果VRF不包括对应于第二主机的IPv6链路本地地址的重复IPv6链路本地地址，则第二交换机将分组在层3路由到第二主机; 如果VRF包括至少一个重复的IPv6链路本地地址，则第二交换机将分组在二层桥接到第二主机。

公开(公告)号：US20150312148A1

公开(公告)日：2015-10-29

申请号：US14794174

申请日：2015-07-08

Applicant: Cisco Technology, Inc.

Inventor： Ming Zhang ,  Chengelpet Ramesh

IPC: H04L12/741 ,  H04L12/937 ,  H04L12/46

CPC classification number: H04L45/74 ,  H04L12/4641 ,  H04L12/4654 ,  H04L49/253

Abstract: Some implementations provide a method for managing switches in a data center that includes: (1) establishing a connection from one switch to another switch in the data center, the data center providing a plurality of virtual local area networks (VLANs), each VLAN including at least one Virtual Machine and capable of spanning across more than one of the plurality of switches; (2) provisioning device prefixes for IPv6 addresses, a given device prefix corresponding to a particular VLAN on a particular switch in the data center, the given device prefix included in a host address of a particular virtual machine, the particular virtual machine hosted on a server computer, the sever computer connected to the particular switch without additional intervening switches; (3) configuring a hardware memory to include prefix information and address information; and (4) transferring packets by using the prefix information and the address information.

Abstract translation: 一些实现提供了一种用于管理数据中心中的交换机的方法，包括：（1）建立从一个交换机到数据中心的另一个交换机的连接，数据中心提供多个虚拟局域网（VLAN），每个VLAN包括 至少一个虚拟机并能跨越所述多个交换机中的一个以上的交换机; （2）为IPv6地址提供设备前缀，对应于数据中心中特定交换机上的特定VLAN的给定设备前缀，包括在特定虚拟机的主机地址中的给定设备前缀，托管在特定虚拟机上的特定虚拟机 服务器计算机，连接到特定交换机的服务器计算机，而不需要附加的中间交换机; （3）配置硬件存储器以包括前缀信息和地址信息; 和（4）通过使用前缀信息和地址信息传送分组。

公开(公告)号：US09973426B2

公开(公告)日：2018-05-15

申请号：US14794174

申请日：2015-07-08

Applicant: Cisco Technology, Inc.

Inventor： Ming Zhang ,  Chengelpet Ramesh

IPC: H04L12/741 ,  H04L12/46 ,  H04L12/937

CPC classification number: H04L45/74 ,  H04L12/4641 ,  H04L12/4654 ,  H04L49/253

Abstract: Some implementations provide a method for managing switches in a data center that includes: (1) establishing a connection from one switch to another switch in the data center, the data center providing a plurality of virtual local area networks (VLANs), each VLAN including at least one Virtual Machine and capable of spanning across more than one of the plurality of switches; (2) provisioning device prefixes for IPv6 addresses, a given device prefix corresponding to a particular VLAN on a particular switch in the data center, the given device prefix included in a host address of a particular virtual machine, the particular virtual machine hosted on a server computer, the sever computer connected to the particular switch without additional intervening switches; (3) configuring a hardware memory to include prefix information and address information; and (4) transferring packets by using the prefix information and the address information.

公开(公告)号：US20140250220A1

公开(公告)日：2014-09-04

申请号：US13781911

申请日：2013-03-01

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Shyam Kapadia ,  Ming Zhang ,  Chengelpet V. Ramesh ,  Nilesh Shah

IPC: G06F9/50

CPC classification number: G06F9/5077 ,  G06F9/45558 ,  G06F2009/4557 ,  H04L12/4625 ,  H04L61/103 ,  H04L61/2015 ,  H04L61/2084

Abstract: Techniques are provided for sending address information of virtual machines to a physical switch. A migration of a virtual machine to a physical server is detected. The physical server obtains address information of the virtual machine, and upon obtaining the address information of the virtual machine, the physical server sends the address information to a first physical switch that is connected to the physical server.

Abstract translation: 提供了用于将虚拟机的地址信息发送到物理交换机的技术。 检测到虚拟机到物理服务器的迁移。 物理服务器获取虚拟机的地址信息，并且在获得虚拟机的地址信息后，物理服务器将地址信息发送到连接到物理服务器的第一物理交换机。

公开(公告)号：US20140229573A1

公开(公告)日：2014-08-14

申请号：US14264101

申请日：2014-04-29

Applicant: Cisco Technology, Inc.

Inventor： Ming Zhang ,  Chengelpet Ramesh

IPC: H04L29/08

CPC classification number: H04L67/02 ,  H04L45/026 ,  H04L49/50 ,  H04L61/6059

Abstract: A distributed neighbor discovery module is disclosed where all neighbor discovery operations and functionalities may be distributed to a switch device processor. Each neighbor discovery process on a switch device may run as an individual neighbor discovery router node. There may be no coordination between neighbor discovery processes occurring on different switch devices. All other traffic, including both IPv6 control traffic and data traffic destined to the router may be processed by the central controller processor.

Abstract translation: 公开了一种分布式邻居发现模块，其中所有邻居发现操作和功能可以被分发到交换设备处理器。 交换机设备上的每个邻居发现过程可以作为单独的邻居发现路由器节点运行。 在不同交换机设备上发生的邻居发现过程之间可能没有协调。 所有其他流量，包括IPv6控制流量和去往路由器的数据流量都可能由中央控制器处理器处理。

公开(公告)号：US20140119379A1

公开(公告)日：2014-05-01

申请号：US13661624

申请日：2012-10-26

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Yaonan Liang ,  Chengelpet V. Ramesh ,  Ganesh P. Murthy ,  Ming Zhang ,  Rajesh B. Nataraja

IPC: H04L12/56

CPC classification number: H04L12/4625 ,  H04L45/02 ,  H04L45/54 ,  H04L45/7457

Abstract: In one embodiment, a method includes receiving from a server, flow data for a plurality of flows at a network device, the flow data comprising for each flow, a destination address and a time indicating when a last packet was processed for the flow at the server, updating a flow table at the network device, identifying one of the flows in the flow table as an inactive flow, and removing a route for the inactive flow from a forwarding information base at the network device. An apparatus and logic are also disclosed herein.

Abstract translation: 在一个实施例中，一种方法包括从服务器接收在网络设备处的多个流的流数据，所述流数据包括针对每个流的目的地地址和指示何时处理最后一个分组的流程 服务器，更新网络设备处的流表，将流表中的一个流识别为非活动流，以及从网络设备的转发信息库中去除不活动流的路由。 本文还公开了一种装置和逻辑。

公开(公告)号：US09559952B2

公开(公告)日：2017-01-31

申请号：US13888052

申请日：2013-05-06

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Shyam Kapadia ,  Chengelpet V. Ramesh ,  Ming Zhang

IPC: H04L12/28 ,  H04L12/56 ,  H04L12/781 ,  H04L12/721

CPC classification number: H04L45/741 ,  H04L45/66

Abstract: An example method for routing IPv6 link-local addresses in a network environment is provided and includes receiving a packet at a first switch from an attached first host in a virtual local area network (VLAN) associated with a virtual routing and forwarding (VRF) instance of a network environment, where the packet is destined to an Internet Protocol version 6 (IPv6) link-local address of a remote second host in the VLAN, and routing the packet at Layer 3 to a second switch, to which the second host is attached. In specific embodiments, the second switch routes the packet at Layer 3 to the second host if the VRF does not include duplicate IPv6 link-local addresses corresponding to the IPv6 link-local address of the second host; the second switch bridges the packet at Layer 2 to the second host if the VRF includes at least one duplicate IPv6 link-local address.

Abstract translation: 提供了用于在网络环境中路由IPv6链路本地地址的示例性方法，并且包括在与虚拟路由和转发（VRF）实例相关联的虚拟局域网（VLAN）中的附接第一主机的第一交换机处接收分组 的网络环境，其中分组去往VLAN中的远程第二主机的因特网协议版本6（IPv6）链路本地地址，并且将第3层的分组路由到第二主机所在的第二交换机 附上。 在具体实施例中，如果VRF不包括对应于第二主机的IPv6链路本地地址的重复IPv6链路本地地址，则第二交换机将分组在层3路由到第二主机; 如果VRF包括至少一个重复的IPv6链路本地地址，则第二交换机将分组在二层桥接到第二主机。