公开(公告)号：US20180026872A1

公开(公告)日：2018-01-25

申请号：US15232655

申请日：2016-08-09

Applicant: Cisco Technology, Inc.

Inventor： Natarajan Manthiramoorthy ,  Venkatesh Srinivasan ,  Swaminathan Narayanan ,  Ambrish Niranjan Mehta ,  Anand Kumar Singh ,  Anulekha Chodey

IPC: H04L12/705 ,  H04L12/721 ,  H04L12/753 ,  H04L29/12 ,  H04L12/46

CPC classification number: H04L45/18 ,  H04L5/0012 ,  H04L12/437 ,  H04L12/4641 ,  H04L43/08 ,  H04L45/28 ,  H04L45/32 ,  H04L45/48 ,  H04L49/354 ,  H04L61/6022 ,  H04L69/324

Abstract: Systems, methods, and computer-readable storage media for detecting network loops. A system can identify, for each virtual tunnel endpoint (VTEP) from multiple VTEPs in a network, respective media access control address data including the respective local interface media access control addresses of the respective VTEP and respective media access control addresses learned by the respective VTEP. The system can determine whether the VTEPs are running spanning tree protocol (STP), and whether a media access control address learned by a first VTEP matches a respective local interface media access control address of a second VTEP. The system can detect a loop when the media access control address learned by the first VTEP matches the respective local interface media access control address of the second VTEP. The system can also detect a loop when the VTEPs are running STP and the first and second VTEPs see the same STP root bridge.

公开(公告)号：US20180026810A1

公开(公告)日：2018-01-25

申请号：US15232591

申请日：2016-08-09

Applicant: Cisco Technology, Inc.

Inventor： Natarajan Manthiramoorthy ,  Venkatesh Srinivasan ,  Swaminathan Narayanan ,  Ambrish Niranjan Mehta ,  Anand Kumar Singh ,  Anulekha Chodey

IPC: H04L12/437 ,  H04L12/46 ,  H04L5/00

Abstract: Systems, methods, and non-transitory computer-readable storage media for detecting network loops. In some embodiments, a system can identify a network path having multiple hops associated with respective nodes which are configured in a forwarding mode. The system can traverse the network path to identify, for each node from the respective nodes, a respective next hop. Based on the respective next hop for each node, the system can determine whether two or more nodes from the respective nodes have a same respective next hop. When the two or more nodes have the same respective next hop, the system can determine that the network path has a network loop.

公开(公告)号：US09870219B1

公开(公告)日：2018-01-16

申请号：US15203583

申请日：2016-07-06

Applicant: Cisco Technology, Inc.

Inventor： Natarajan Manthiramoorthy ,  Venkatesh Srinivasan ,  Swaminathan Narayanan ,  Anand Kumar Singh ,  Ambrish Niranjan Mehta ,  Anulekha Chodey

IPC: G06F9/44 ,  G06F9/445 ,  H04L29/12 ,  H04L29/08 ,  G06F17/30

CPC classification number: G06F8/65 ,  G06F9/455 ,  G06F17/30088 ,  H04L61/1511 ,  H04L61/6004 ,  H04L67/34

Abstract: Mechanisms for switch upgrades using remote containers. An example system can export, to a server, a state of software processes associated with a first software container at the system. The system can generate a lightweight software container configured to forward traffic associated with the first software container to a second software container at the server, generated based on the state. The system can perform a switchover between the first software container and lightweight software container. The switchover can enable the lightweight software container to forward, to the second container, traffic associated with the first software container. The system can generate a fourth software container based on a snapshot of the second software container, and perform another switchover between the lightweight software container and fourth software container. The switchover can include enabling the fourth software container to handle traffic associated with the first software container, and disabling the lightweight software container.

公开(公告)号：US20170331747A1

公开(公告)日：2017-11-16

申请号：US15152971

申请日：2016-05-12

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Anand Kumar Singh ,  Venkatesh Srinivasan ,  Swaminathan Narayanan ,  Anulekha Chodey ,  Ambrish Niranjan Mehta ,  Natarajan Manthiramoorthy

IPC: H04L12/813 ,  H04L12/823 ,  H04L12/855

CPC classification number: H04L47/20 ,  H04L47/2466 ,  H04L47/323

Abstract: Aspects of the present disclosure are directed to dynamically adjusting control plane policing throughput of low (or lower) priority control plane traffic to permit higher throughput. The drop rate for low or lower priority control plane traffic can be determined to be above a threshold value. The processor utilization can be determined to be operating under normal utilization (or at a utilization within a threshold utilization value). The control plane policing for control plane traffic for the low or lower class of service can be increased (or decreased) to permit lower class of service control traffic to be transmitted using higher class of service resources without adjusting the priority levels for the lower class of service control traffic.

公开(公告)号：US10951531B2

公开(公告)日：2021-03-16

申请号：US16215352

申请日：2018-12-10

Applicant: Cisco Technology, Inc.

Inventor： Anand Kumar Singh ,  Venkatesh Srinivasan ,  Swaminathan Narayanan ,  Anulekha Chodey ,  Ambrish Niranjan Mehta ,  Natarajan Manthiramoorthy

IPC: H04L12/813 ,  H04L12/823 ,  H04L12/855

Abstract: Aspects of the present disclosure are directed to dynamically adjusting control plane policing throughput of low (or lower) priority control plane traffic to permit higher throughput. The drop rate for low or lower priority control plane traffic can be determined to be above a threshold value. The processor utilization can be determined to be operating under normal utilization (or at a utilization within a threshold utilization value). The control plane policing for control plane traffic for the low or lower class of service can be increased (or decreased) to permit lower class of service control traffic to be transmitted using higher class of service resources without adjusting the priority levels for the lower class of service control traffic.

公开(公告)号：US10333836B2

公开(公告)日：2019-06-25

申请号：US15486933

申请日：2017-04-13

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Natarajan Manthiramoorthy ,  Venkatesh Srinivasan ,  Rajesh Sharma

IPC: H04L12/753 ,  H04L12/46

Abstract: Methods for assisting data forwarding during convergence in a multi-homed network are disclosed. In one aspect, a first leaf node is configured to detect when a second leaf node advertises a set of Ethernet segments which are local to the first leaf and advertise reachability information for the second leaf, indicating itself as a backup for the second leaf during convergence. A spine node that receives advertisement messages from such first and second leaf nodes programs its routing table to indicate the direct route to the second leaf as the primary path and the route to the second leaf via the first leaf as a backup path to forward encapsulated packets destined to the second leaf. Upon failure of the second leaf, when the spine node receives data packets destined to the second leaf, the spine node sends the packets to the first leaf instead of the second leaf.

公开(公告)号：US10320838B2

公开(公告)日：2019-06-11

申请号：US15215290

申请日：2016-07-20

Applicant: Cisco Technology, Inc.

Inventor： Venkatesh Srinivasan ,  Ambrish Niranjan Mehta ,  Anand Kumar Singh ,  Anulekha Chodey ,  Natarajan Manthiramoorthy ,  Swaminathan Narayanan

IPC: H04L29/06 ,  H04L29/12 ,  H04L12/931 ,  H04L12/46

Abstract: Systems, methods, and computer-readable media for preventing man-in-the-middle attacks within network, without the need to maintain trusted/un-trusted port listings on each network device. The solutions disclosed herein leverage a host database which can be present on controllers, thereby providing a centralized database instead of a per-node DHCP binding database. Systems configured according to this disclosure (1) use a flood list only for ARP packets received from the controller 116; and (2) unicast ARP packets to the controller before communicating the packets to other VTEPs.

公开(公告)号：US20180302321A1

公开(公告)日：2018-10-18

申请号：US15486933

申请日：2017-04-13

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Natarajan Manthiramoorthy ,  Venkatesh Srinivasan ,  Rajesh Sharma

IPC: H04L12/753 ,  H04L29/06

CPC classification number: H04L45/48 ,  H04L12/4633 ,  H04L12/4641 ,  H04L45/50 ,  H04L45/74 ,  H04L45/7453 ,  H04L49/1569

Abstract: Methods for assisting data forwarding during convergence in a multi-homed network are disclosed. In one aspect, a first leaf node is configured to detect when a second leaf node advertises a set of Ethernet segments which are local to the first leaf and advertise reachability information for the second leaf, indicating itself as a backup for the second leaf during convergence. A spine node that receives advertisement messages from such first and second leaf nodes programs its routing table to indicate the direct route to the second leaf as the primary path and the route to the second leaf via the first leaf as a backup path to forward encapsulated packets destined to the second leaf. Upon failure of the second leaf, when the spine node receives data packets destined to the second leaf, the spine node sends the packets to the first leaf instead of the second leaf.

公开(公告)号：US20180027012A1

公开(公告)日：2018-01-25

申请号：US15215290

申请日：2016-07-20

Applicant: Cisco Technology, Inc.

Inventor： Venkatesh Srinivasan ,  Ambrish Niranjan Mehta ,  Anand Kumar Singh ,  Anulekha Chodey ,  Natarajan Manthiramoorthy ,  Swaminathan Narayanan

IPC: H04L29/06 ,  H04L12/931 ,  H04L12/46 ,  H04L29/12

CPC classification number: H04L63/1466 ,  H04L12/4641 ,  H04L49/70 ,  H04L61/103 ,  H04L61/2015 ,  H04L61/6022 ,  H04L63/101 ,  H04L63/1416 ,  H04L63/1483 ,  H04L2463/145

Abstract: Systems, methods, and computer-readable media for preventing man-in-the-middle attacks within network, without the need to maintain trusted/un-trusted port listings on each network device. The solutions disclosed herein leverage a host database which can be present on controllers, thereby providing a centralized database instead of a per-node DHCP binding database. Systems configured according to this disclosure (1) use a flood list only for ARP packets received from the controller 116; and (2) unicast ARP packets to the controller before communicating the packets to other VTEPs.