公开(公告)号：US20190281011A1

公开(公告)日：2019-09-12

申请号：US15914522

申请日：2018-03-07

Applicant: Cisco Technology, Inc.

Inventor： Tak Ming Francis Pang ,  Bo Yang ,  Maruth N. Kamath ,  Xinggang Zhou

IPC: H04L29/12 ,  H04W76/10

Abstract: An access point (AP) operates in a network of APs, each configured with a distinct IP address with which to communicate with a wide area network (WAN), and each configured to connect wirelessly with wireless client devices seeking access to the WAN via the each AP. The AP derives, based on the distinct IP address, a standalone pool of IP addresses for assignment to wireless client devices, such that the IP addresses do not overlap with IP addresses of any other standalone pool of IP addresses derived by any other of the APs; The AP operates in a standalone mode to: receive from wireless client devices connecting with the AP respective requests for IP addresses for use by the wireless client devices; and responsive to each request, dynamically assign to the wireless client device that sent the request a respective IP address from the standalone pool of IP addresses.

公开(公告)号：US10574627B2

公开(公告)日：2020-02-25

申请号：US15914522

申请日：2018-03-07

Applicant: Cisco Technology, Inc.

Inventor： Tak Ming Francis Pang ,  Bo Yang ,  Maruth N. Kamath ,  Xinggang Zhou

IPC: H04L29/12 ,  H04W76/10 ,  H04W84/12 ,  H04W88/08

Abstract: An access point (AP) operates in a network of APs, each configured with a distinct IP address with which to communicate with a wide area network (WAN), and each configured to connect wirelessly with wireless client devices seeking access to the WAN via the each AP. The AP derives, based on the distinct IP address, a standalone pool of IP addresses for assignment to wireless client devices, such that the IP addresses do not overlap with IP addresses of any other standalone pool of IP addresses derived by any other of the APs; The AP operates in a standalone mode to: receive from wireless client devices connecting with the AP respective requests for IP addresses for use by the wireless client devices; and responsive to each request, dynamically assign to the wireless client device that sent the request a respective IP address from the standalone pool of IP addresses.

公开(公告)号：US09559854B2

公开(公告)日：2017-01-31

申请号：US14312347

申请日：2014-06-23

Applicant: Cisco Technology, Inc.

Inventor： Liqin Dong ,  Yibin Yang ,  Xinggang Zhou

IPC: G01R31/08 ,  H04L12/18 ,  H04L12/24 ,  H04L12/801

CPC classification number: H04L12/18 ,  H04L12/185 ,  H04L12/1886 ,  H04L41/0654 ,  H04L41/0843 ,  H04L45/16 ,  H04L47/12

Abstract: Multi-destination frames in a network fabric may be carried in IP multicast packets. As such, the network fabric may us IP multicast technique such as a PIM protocol for handling the multi-destination frames. To provide redundancy, the system administrator can use phantom rendezvous points (RPs) that include multiple physical RPs where one of the RPs serves as a primary RP and the other RPs serve as secondary RPs (e.g., backup RPs). Instead of the system administrator manually configuring the phantom RPs, the RPs are automatically configured. To do so, the system administrator may use a GUI to provide multicast groups allocated for the multi-destination traffic, the number of desired phantom RPs (or physical RPs), and the desired RP redundancy. Based on these parameters, a data center manager generates one or more templates that automatically configure the network devices in the fabric as they are booted.

Abstract translation: 网络结构中的多目的帧可以在IP组播数据包中携带。 因此，网络结构可能需要IP组播技术，例如用于处理多目的地帧的PIM协议。 为了提供冗余，系统管理员可以使用包含多个物理RP的幻像会合点（RP），其中一个RP用作主RP，而其他RP用作辅助RP（例如备份RP）。 而不是系统管理员手动配置幻像RP，RP会自动配置。 为此，系统管理员可以使用GUI来提供为多目的地业务分配的组播组，所需的幻象RP（或物理RP）的数量以及期望的RP冗余。 基于这些参数，数据中心管理器生成一个或多个模板，在模板启动时自动配置网络设备。

公开(公告)号：US09503277B2

公开(公告)日：2016-11-22

申请号：US14340079

申请日：2014-07-24

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Liqin Dong ,  Yibin Yang ,  Di Jin ,  Xinggang Zhou ,  Siu-Man Leung

IPC: H04L12/28 ,  H04L12/46 ,  H04L12/751

CPC classification number: H04L12/4641 ,  H04L12/4633 ,  H04L45/021 ,  H04L45/08 ,  H04L2012/4629

Abstract: A method is provided in one example embodiment and includes acquiring at a local network element information regarding a remote network element via a control protocol distribution method and refraining from instantiating the remote VTEP for the remote network element on the local network element until unicast traffic from the local network element to the remote network element via an overlay network has begun. The method may further include detecting unicast traffic from the local network element to the remote network element and subsequent to the detecting, instantiating the remote VTEP for the remote network element on the local network element. Some embodiments may include detecting cessation of the unicast traffic from the local network element to the remote network element and subsequent to the detecting cessation, uninstantiating the remote VTEP for the remote network element from the local network element.

Abstract translation: 在一个示例实施例中提供了一种方法，并且包括通过控制协议分发方法在本地网络单元获取关于远程网络元件的信息，并且避免对本地网络元件上的远程网元实例化远程VTEP，直到来自 已经开始通过覆盖网络到远程网元的本地网元。 该方法还可以包括检测从本地网络单元到远程网络单元的单播业务，并且在本地网络元件上检测，实例化远程网络元件的远程VTEP之后。 一些实施例可以包括检测从本地网络元件到远程网络元件的停止，并且在检测停止之后，从远离的网络元件的远程VTEP与本地网络元件相抵消。

公开(公告)号：US10298490B2

公开(公告)日：2019-05-21

申请号：US14963470

申请日：2015-12-09

Applicant: Cisco Technology, Inc.

Inventor： Liqin Dong ,  Yibin Yang ,  Lukas Krattiger ,  Xinggang Zhou ,  Di Jin ,  Siu-Man Leung

IPC: H04L29/06 ,  H04L12/721 ,  H04L12/46 ,  H04L12/66 ,  H04L12/715 ,  H04L12/775 ,  H04L12/753

Abstract: Coexistence and migration of legacy and VXLAN networks may be provided. A first anchor leaf switch and a second anchor leaf switch may detect that they can reach each other over a Virtual Extensible Local Area Network (VXLAN) overlay layer 2 network. In response to detecting that they can reach each other over the VXLAN, the second anchor leaf switch may block VLANs mapped to the VXLAN's VXLAN Network Identifier (VNI) on the second anchor leaf switch's ports connecting to spine routers. In addition, the first anchor leaf switch and the second anchor leaf switch may detect that they can reach each other over a physical layer 2 network. In response to detecting that they can reach each other over a physical layer 2 network, the second anchor leaf switch may block Virtual Extensible Local Area Network (VXLAN) segments at the second anchor leaf switch.

公开(公告)号：US20170171056A1

公开(公告)日：2017-06-15

申请号：US14963470

申请日：2015-12-09

Applicant: Cisco Technology, Inc.

Inventor： Liqin Dong ,  Yibin Yang ,  Lukas Krattiger ,  Xinggang Zhou ,  Di Jin ,  Siu-Man Leung

IPC: H04L12/751 ,  H04L12/721 ,  H04L12/715 ,  H04L12/46 ,  H04L12/66

CPC classification number: H04L45/66 ,  H04L12/4641 ,  H04L12/66 ,  H04L45/48 ,  H04L45/58 ,  H04L45/64

Abstract: Coexistence and migration of legacy and VXLAN networks may be provided. A first anchor leaf switch and a second anchor leaf switch may detect that they can reach each other over a Virtual Extensible Local Area Network (VXLAN) overlay layer 2 network. In response to detecting that they can reach each other over the VXLAN, the second anchor leaf switch may block VLANs mapped to the VXLAN's VXLAN Network Identifier (VNI) on the second anchor leaf switch's ports connecting to spine routers. In addition, the first anchor leaf switch and the second anchor leaf switch may detect that they can reach each other over a physical layer 2 network. In response to detecting that they can reach each other over a physical layer 2 network, the second anchor leaf switch may block Virtual Extensible Local Area Network (VXLAN) segments at the second anchor leaf switch.

公开(公告)号：US20160028557A1

公开(公告)日：2016-01-28

申请号：US14340079

申请日：2014-07-24

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Liqin Dong ,  Yibin Yang ,  Di Jin ,  Xinggang Zhou ,  Siu-Man Leung

IPC: H04L12/46 ,  H04L12/751

CPC classification number: H04L12/4641 ,  H04L12/4633 ,  H04L45/021 ,  H04L45/08 ,  H04L2012/4629

Abstract: A method is provided in one example embodiment and includes acquiring at a local network element information regarding a remote network element via a control protocol distribution method and refraining from instantiating the remote VTEP for the remote network element on the local network element until unicast traffic from the local network element to the remote network element via an overlay network has begun. The method may further include detecting unicast traffic from the local network element to the remote network element and subsequent to the detecting, instantiating the remote VTEP for the remote network element on the local network element. Some embodiments may include detecting cessation of the unicast traffic from the local network element to the remote network element and subsequent to the detecting cessation, uninstantiating the remote VTEP for the remote network element from the local network element.

Abstract translation: 在一个示例实施例中提供了一种方法，并且包括通过控制协议分发方法在本地网络单元获取关于远程网络元件的信息，并且避免对本地网络元件上的远程网元实例化远程VTEP，直到来自 已经开始通过覆盖网络到远程网元的本地网元。 该方法还可以包括检测从本地网络单元到远程网络单元的单播业务，并且在本地网络元件上检测，实例化远程网络元件的远程VTEP之后。 一些实施例可以包括检测从本地网络元件到远程网络元件的停止，并且在检测停止之后，从远离的网络元件的远程VTEP与本地网络元件相抵消。