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    MISCABLING DETECTION PROTOCOL
    12.
    发明申请
    MISCABLING DETECTION PROTOCOL 有权
    错误检测协议

    公开(公告)号：US20150124643A1

    公开(公告)日：2015-05-07

    申请号：US14448733

    申请日：2014-07-31

    Applicant: Cisco Technology, Inc.

    Inventor： Ayaskant Pani ,  Navindra Yadav ,  Krishna Doddapaneni

    IPC: H04L12/947 ,  H04L12/931 ,  H04L12/24 ,  H04L12/18

    CPC classification number: H04L12/18 ,  H04L12/4633 ,  H04L41/082 ,  H04L41/12 ,  H04L41/22 ,  H04L43/0811 ,  H04L43/50 ,  H04L45/02 ,  H04L45/12 ,  H04L45/16 ,  H04L45/18 ,  H04L45/20 ,  H04L45/28 ,  H04L45/48 ,  H04L45/64 ,  H04L49/201 ,  H04L49/25 ,  H04L61/103 ,  H04L61/2007 ,  H04L61/2061 ,  H04L61/6004 ,  H04L69/22

    Abstract: Systems, methods, and non-transitory computer-readable storage media for a miscabling detection protocol. One or more switches can periodically send miscabling protocol (MCP) packets on non-fabric ports on all configured EPG VLANs. A first switch located at a network fabric receives a miscabling protocol (MCP) packet indicating an identity of an originating switch and a port number of an originating port of the MCP packet via a receiving port on the first switch, wherein the MCP packet is received from an external network connected to the receiving port, and wherein the originating switch and originating port are also located at the network fabric and connected to the external network. Based on the MCP packet, the first switch then detects a loop between the receiving port, the originating port, and the external network. Next, the first switch blocks the receiving port or the originating port in response to detecting the loop.

    Abstract translation: 系统，方法和非暂时的计算机可读存储介质，用于混合检测协议。 一个或多个交换机可以在所有配置的EPG VLAN上的非Fabric端口周期性地发送miscable协议（MCP）数据包。 位于网络结构的第一交换机经由第一交换机上的接收端口接收指示发起交换机的标识和MCP分组的始发端口的端口号的混合协议（MCP）分组，其中接收到该MCP分组 来自连接到接收端口的外部网络，并且其中始发交换机和始发端口也位于网络结构处并连接到外部网络。 基于MCP分组，第一交换机然后检测接收端口，始发端口和外部网络之间的环路。 接下来，响应于检测到环路，第一交换机阻塞接收端口或始发端口。

    TRACEROUTE IN A DENSE VXLAN NETWORK
    13.
    发明申请
    TRACEROUTE IN A DENSE VXLAN NETWORK 有权
    跟踪VXLAN网络

    公开(公告)号：US20150124629A1

    公开(公告)日：2015-05-07

    申请号：US14449033

    申请日：2014-07-31

    Applicant: Cisco Technology, Inc.

    Inventor： Ayaskant Pani

    IPC: H04L12/26

    CPC classification number: H04L12/18 ,  H04L12/4633 ,  H04L41/082 ,  H04L41/12 ,  H04L41/22 ,  H04L43/0811 ,  H04L43/50 ,  H04L45/02 ,  H04L45/12 ,  H04L45/16 ,  H04L45/18 ,  H04L45/20 ,  H04L45/28 ,  H04L45/48 ,  H04L45/64 ,  H04L49/201 ,  H04L49/25 ,  H04L61/103 ,  H04L61/2007 ,  H04L61/2061 ,  H04L61/6004 ,  H04L69/22

    Abstract: Systems, methods and non-transitory computer-readable storage media for determining interconnectivity in dense networks. The method includes generating, at a first network device in a data network, a traceroute packet that includes source and destination address information. The packet is encapsulated in an outer packet, and the encapsulated packet is forwarded to a second network device and to one or more intermediate network devices in the data network. A response packet is received from the second network device and each of the intermediate network devices that received the traceroute packet. The first network device determines, based on the responsive packets, an end-to-end path taken by the traceroute packet through the data network.

    Abstract translation: 用于确定密集网络中的互连性的系统，方法和非暂时计算机可读存储介质。 该方法包括在数据网络中的第一网络设备处生成包括源和目的地址信息的跟踪路由分组。 该分组被封装在外部分组中，并且封装的分组被转发到第二网络设备和数据网络中的一个或多个中间网络设备。 从第二网络设备接收响应分组以及接收到跟踪路由分组的每个中间网络设备。 第一网络设备基于响应分组确定由跟踪路由分组通过数据网络采取的端到端路径。

    STAGE UPGRADE OF IMAGE VERSIONS ON DEVICES IN A CLUSTER
    15.
    发明申请
    STAGE UPGRADE OF IMAGE VERSIONS ON DEVICES IN A CLUSTER 审中-公开

    公开(公告)号：US20200293180A1

    公开(公告)日：2020-09-17

    申请号：US16833305

    申请日：2020-03-27

    Applicant: Cisco Technology, Inc.

    Inventor： Ayaskant Pani

    IPC: G06F3/0484 ,  H04L12/24

    Abstract: Systems, methods, and non-transitory computer-readable storage media for stage upgrades in a network. The system generates graph-data structured based representations of devices in the network, wherein respective attributes of the representations is selected based on respective services provided by the devices to tenants in the network and identities of respective tenants serviced by the devices. Next, the system generates a graph showing a distribution of the devices in the network according to the representations, wherein the representations are interconnected in the graph based on service roles of associated devices with respect to tenants in the network and other devices associated with the tenants. The system then schedules an upgrade of devices based on the graph, the upgrade being scheduled in stages, each stage including devices selected for upgrade in that stage, wherein the devices for each stage are selected by identifying devices having respective representations assigned to that specific stage.

    TENANT DHCP IN AN OVERLAY NETWORK
    16.
    发明申请
    TENANT DHCP IN AN OVERLAY NETWORK 审中-公开
    在重叠网络中使用DHCP

    公开(公告)号：US20150124823A1

    公开(公告)日：2015-05-07

    申请号：US14484165

    申请日：2014-09-11

    Applicant: Cisco Technology, Inc.

    Inventor： Ayaskant Pani ,  Sanjay Thyamagundalu

    IPC: H04L12/715 ,  H04L29/06 ,  H04L29/12

    CPC classification number: H04L12/18 ,  H04L12/4633 ,  H04L41/082 ,  H04L41/12 ,  H04L41/22 ,  H04L43/0811 ,  H04L43/50 ,  H04L45/02 ,  H04L45/12 ,  H04L45/16 ,  H04L45/18 ,  H04L45/20 ,  H04L45/28 ,  H04L45/48 ,  H04L45/64 ,  H04L49/201 ,  H04L49/25 ,  H04L61/103 ,  H04L61/2007 ,  H04L61/2061 ,  H04L61/6004 ,  H04L69/22

    Abstract: Systems, methods, and non-transitory computer-readable storage media for dynamic host configuration protocol (DHCP) relay functionality in overlay networks. A system on a overlay network fabric can first receive a DHCP request from a host device, the system including a tunnel endpoint (TEP) configured to connect the host device to the overlay network fabric via a tunnel. The system then enables a relay agent information option for relaying the DHCP request with sub-options inserted into the DHCP request, and inserts information into to the sub-options in the DHCP request to yield a modified DHCP request. Here, the information can include an address of the system and an interface of a circuit associated with the system, etc. Next, the system forwards the modified DHCP request to a destination DHCP server based on an address of the destination DHCP server associated with the DHCP request.

    Abstract translation: 用于覆盖网络中动态主机配置协议（DHCP）中继功能的系统，方法和非暂时性计算机可读存储介质。 覆盖网络结构上的系统可以首先从主机设备接收DHCP请求，该系统包括被配置为经由隧道将主机设备连接到覆盖网络结构的隧道端点（TEP）。 然后，该系统启用中继代理信息选项，将DHCP请求中继到DHCP请求中插入的子选项，并将信息插入DHCP请求中的子选项以产生修改的DHCP请求。 这里，信息可以包括系统的地址和与系统相关联的电路的接口等。接下来，系统基于与目的地DHCP服务器相关联的目的地DHCP服务器的地址将修改的DHCP请求转发到目的地DHCP服务器 DHCP请求。

    LOOP DETECTION AND REPAIR IN A MULTICAST TREE
    17.
    发明申请
    LOOP DETECTION AND REPAIR IN A MULTICAST TREE 有权
    多重树中的环路检测和修复

    公开(公告)号：US20150124587A1

    公开(公告)日：2015-05-07

    申请号：US14329729

    申请日：2014-07-11

    Applicant: Cisco Technology, Inc.

    Inventor： Ayaskant Pani

    IPC: H04L12/24 ,  H04L12/18 ,  H04L12/733 ,  H04L12/26

    CPC classification number: H04L12/18 ,  H04L12/4633 ,  H04L41/082 ,  H04L41/12 ,  H04L41/22 ,  H04L43/0811 ,  H04L43/50 ,  H04L45/02 ,  H04L45/12 ,  H04L45/16 ,  H04L45/18 ,  H04L45/20 ,  H04L45/28 ,  H04L45/48 ,  H04L45/64 ,  H04L49/201 ,  H04L49/25 ,  H04L61/103 ,  H04L61/2007 ,  H04L61/2061 ,  H04L61/6004 ,  H04L69/22

    Abstract: Systems, methods and transitory computer-readable storage media for detecting one or more loops in a multicast tree. The method includes calculating a multicast tree radius for a first multicast tree, the multicast tree radius representing a maximum number of hops from a root node to a furthest edge node in the first multicast tree, forwarding, by the root node, a first packet to each edge node within the first multicast tree, the first packet having a time-to-live (TTL) value equal to twice the first multicast tree radius, receiving, at the root node, a copy of the forwarded first packet, and determining an existence of a loop in the first multicast tree based at least upon receiving the copy of the forwarded first packet.

    Abstract translation: 用于检测多播树中的一个或多个循环的系统，方法和暂时的计算机可读存储介质。 该方法包括计算第一组播树的组播树半径，组播树半径表示从根节点到第一组播树中最远边缘节点的最大跳数，根节点将第一分组转发到 在所述第一多播树内的每个边缘节点，所述第一分组具有等于所述第一多播树半径的两倍的生存时间（TTL）值，在所述根节点处接收所转发的第一分组的副本，以及确定 至少在接收到转发的第一分组的副本时，在第一多播树中存在循环。

    Stage upgrade of image versions on devices in a cluster
    18.
    发明授权
    Stage upgrade of image versions on devices in a cluster 有权

    公开(公告)号：US11625154B2

    公开(公告)日：2023-04-11

    申请号：US16833305

    申请日：2020-03-27

    Applicant: Cisco Technology, Inc.

    Inventor： Ayaskant Pani

    IPC: G06F3/04842 ,  H04L45/00 ,  H04L41/0823 ,  H04L41/0893 ,  H04L41/12 ,  H04L41/082 ,  H04L49/60 ,  H04L41/5054 ,  H04L41/22

    Abstract: Systems, methods, and non-transitory computer-readable storage media for stage upgrades in a network. The system generates graph-data structured based representations of devices in the network, wherein respective attributes of the representations is selected based on respective services provided by the devices to tenants in the network and identities of respective tenants serviced by the devices. Next, the system generates a graph showing a distribution of the devices in the network according to the representations, wherein the representations are interconnected in the graph based on service roles of associated devices with respect to tenants in the network and other devices associated with the tenants. The system then schedules an upgrade of devices based on the graph, the upgrade being scheduled in stages, each stage including devices selected for upgrade in that stage, wherein the devices for each stage are selected by identifying devices having respective representations assigned to that specific stage.

    Recovering from virtual port channel peer failure
    19.
    发明授权
    Recovering from virtual port channel peer failure 有权

    公开(公告)号：US10819563B2

    公开(公告)日：2020-10-27

    申请号：US16173116

    申请日：2018-10-29

    Applicant: Cisco Technology, Inc.

    Inventor： Ayaskant Pani ,  Saurabh Agarwal ,  Srinivas Tatikonda ,  Sarat Kamisetty

    IPC: H04L12/24 ,  H04L12/709 ,  H04L12/703 ,  H04L12/707 ,  H04L12/713 ,  H04L12/937 ,  H04L12/721

    Abstract: Systems, methods, and non-transitory computer-readable storage media for recovering from a partial failure of a virtual port chain (vPC) domain. The first and second vPC peers may be paired to create a vPC having a virtual address. An endpoint host may communicate with a network via the virtual port channel. The system may detect that the first virtual port channel peer is down. During or after the first vPC reboots, the reachability cost for the first vPC with regards to the virtual address can be set to an inflated value. The first vPC peer may also delay its bring up time while it synchronizes its vPC state information with the second vPC peer. The second vPC can continue to advertise the association between the endpoint host and the virtual address. Upon completion of the synchronization, the first vPC peer may bring up the link and restore the reachability cost.

    RECOVERING FROM VIRTUAL PORT CHANNEL PEER FAILURE
    20.
    发明申请
    RECOVERING FROM VIRTUAL PORT CHANNEL PEER FAILURE 审中-公开

    公开(公告)号：US20190334762A1

    公开(公告)日：2019-10-31

    申请号：US16173116

    申请日：2018-10-29

    Applicant: Cisco Technology, Inc.

    Inventor： Ayaskant Pani ,  Saurabh Agarwal ,  Srinivas Tatikonda ,  Sarat Kamisetty

    IPC: H04L12/24 ,  H04L12/703 ,  H04L12/713 ,  H04L12/709 ,  H04L12/707 ,  H04L12/937

    Abstract: Systems, methods, and non-transitory computer-readable storage media for recovering from a partial failure of a virtual port chain (vPC) domain. The first and second vPC peers may be paired to create a vPC having a virtual address. An endpoint host may communicate with a network via the virtual port channel. The system may detect that the first virtual port channel peer is down. During or after the first vPC reboots, the reachability cost for the first vPC with regards to the virtual address can be set to an inflated value. The first vPC peer may also delay its bring up time while it synchronizes its vPC state information with the second vPC peer. The second vPC can continue to advertise the association between the endpoint host and the virtual address. Upon completion of the synchronization, the first vPC peer may bring up the link and restore the reachability cost.

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