公开(公告)号：US10785186B2

公开(公告)日：2020-09-22

申请号：US16226444

申请日：2018-12-19

Applicant: Cisco Technology, Inc.

Inventor： Mehak Mahajan ,  Samir D. Thoria ,  Shyam Kapadia

IPC: H04L29/12 ,  H04L12/46 ,  H04L29/08 ,  G06F9/455

Abstract: A method is provided in one example embodiment and includes receiving at a controller an Address Resolution Protocol (“ARP”) packet from a source VXLAN Tunnel End Point (“VTEP”) serving a source host and identifying a destination, the source VTEP having assigned thereto a Virtual Network Identifier (“VNI”) identifying a VXLAN network to which the source VTEP and a plurality of other VTEPs belong, the ARP packet being received by the controller via a control plane; determining whether the received ARP packet is a request message; and, if the received ARP packet is a request message, determining whether address information for the identified destination is stored in a cache of the controller.

公开(公告)号：US10708185B2

公开(公告)日：2020-07-07

申请号：US15827183

申请日：2017-11-30

Applicant: Cisco Technology, Inc.

Inventor： Sathish Srinivasan ,  Shyam Kapadia ,  Lukas Krattiger ,  Rajesh Sharma

IPC: H04L12/741 ,  H04L12/713 ,  H04L12/46 ,  H04L29/06

Abstract: A first network device advertises routes of locally connected routes/subnetworks based on the connectivity of the host with respect to peer network devices. The first network device establishes a virtual port channel associated with a virtual network address. The virtual port channel includes the first network device associated with a first network address and a second network device associated with a second network address. The first network device detects that a host is connected to the first network device and determines a next hop address to associate with the host. The next hop address is determined based on whether the host is also connected to the second network device of the virtual port channel. The first network device generates a route advertisement associating the next hop address with the host.

公开(公告)号：US10523504B1

公开(公告)日：2019-12-31

申请号：US15842411

申请日：2017-12-14

Applicant: Cisco Technology, Inc.

Inventor： Vipin Jain ,  Suran Saminda de Silva ,  Shyam Kapadia ,  Nilesh Shah

IPC: H04L12/24 ,  H04L12/933

Abstract: A method is provided in one example embodiment and includes creating a segment organization, which includes a configuration profile. The method also includes attaching the configuration profile to a server in the segment organization. The method further includes sending the attached configuration profile to a database in a physical network.

公开(公告)号：US10516544B2

公开(公告)日：2019-12-24

申请号：US15649479

申请日：2017-07-13

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Victor Manuel Moreno ,  Shyam Kapadia ,  Sanjay Kumar Hooda

IPC: G06F17/30 ,  H04L29/12 ,  H04L12/18 ,  H04L29/06 ,  H04L12/46 ,  H04L12/24 ,  H04L12/733 ,  H04L12/761

Abstract: A Location/Identifier Separation Protocol (LISP) mapping server, including: a network interface for communicating with a LISP-enabled network; a mapping database; an extranet policy table; and a shared subnetwork mapping engine (SSME), including at least a hardware platform, configured to: receive a map request from a first endpoint serviced by a first xTR, the first endpoint on a first subnetwork, the map request for a second endpoint; determine that the second endpoint is not a member of the first subnetwork; query the extranet policy table to identify a second subnetwork that the first subnetwork subscribes to, and to determine that the second endpoint is a member of the second subnetwork; and provide to the first subnetwork a routing locator (RLOC) of an xTR servicing the second endpoint.

公开(公告)号：US10298698B2

公开(公告)日：2019-05-21

申请号：US15205031

申请日：2016-07-08

Applicant: Cisco Technology, Inc.

Inventor： Shyam Kapadia ,  Lukas Krattiger ,  Wing Hon Yeung ,  Uffaz Nathaniel ,  Richard Lam

IPC: H04L29/08 ,  H04L12/24 ,  H04L12/46

Abstract: Presented herein are techniques for actively monitoring, at a network controller, a network location of an endpoint connected to the network based on control plane updates. The network controller is configured to archive the network location of the endpoint, along with local information for the endpoint, in an endpoint tracking database of the network controller.

公开(公告)号：US20180309685A1

公开(公告)日：2018-10-25

申请号：US15496146

申请日：2017-04-25

Applicant: Cisco Technology, Inc.

Inventor： Sathish Srinivasan ,  Shyam Kapadia ,  Deepak Kumar ,  Indrajanti Pallikala ,  Rohit Mendiratta ,  Lukas Krattiger

IPC: H04L12/855 ,  H04L12/725 ,  H04L12/741 ,  H04L29/12 ,  H04L12/46 ,  H04L12/715

CPC classification number: H04L45/04 ,  H04L45/302 ,  H04L45/745 ,  H04L61/103 ,  H04L61/2007 ,  H04L61/6022

Abstract: A first network node of a computer network discovers a host route by leveraging a temporary host route on the control plane of the computer network. The first network node receives, from a source host, a request for a host route associated with a destination host. The first network node determines that it has not previously stored the host route associated with the destination host, and generates a temporary host route associated with the destination host. The first network node propagates the temporary host route across the control plane of the computer network, causing each respective network node to discover if the destination host is connected to the respective network node.

公开(公告)号：US20180183753A1

公开(公告)日：2018-06-28

申请号：US15465496

申请日：2017-03-21

Applicant: Cisco Technology, Inc.

Inventor： Srividya Vemulakonda ,  Huilong Huang ,  Shyam Kapadia ,  Rajesh B. Nataraja ,  Liqin Dong ,  Stephanie Wong

IPC: H04L29/12 ,  H04L12/24

CPC classification number: H04L61/2015 ,  H04L41/0809 ,  H04L41/0853 ,  H04L41/0876 ,  H04L41/0886 ,  H04L61/103 ,  H04L61/6022

Abstract: In one implementation, a method performed by a first node with interfaces configured as IP unnumbered interfaces sharing a single IP address and to communicate with a DHCP-associated second node includes: obtaining a first message that indicates a configuration status of a third node at a respective interface; obtaining a second message for the third node from the DHCP-associated second node that includes a temporary IP address for the third node and an indicator of a file server; obtaining a third message associated with the third node that includes the temporary IP address, the third message requests address information for the file server; and configuring the third node by establishing a connection between the third node and the file server to transfer at least one configuration file, where configuring the third node includes providing the temporary IP address to the DHCP-associated second node via BGP.

公开(公告)号：US20180054326A1

公开(公告)日：2018-02-22

申请号：US15785134

申请日：2017-10-16

Applicant: Cisco Technology, Inc.

Inventor： Shyam Kapadia ,  Rick Chang ,  Yibin Yang ,  Rajesh Babu Nataraja

IPC: H04L12/46 ,  H04L12/24 ,  H04L12/931 ,  H04L12/753

CPC classification number: H04L12/4641 ,  H04L12/4625 ,  H04L12/4633 ,  H04L41/0803 ,  H04L41/0816 ,  H04L41/12 ,  H04L41/26 ,  H04L45/48 ,  H04L49/354

Abstract: In accordance with one example embodiment, there is provided a system configured for virtual local area network (VLAN) blocking on a virtual port channel (vPC) member link to handle discrepant virtual network instance (VNI) to VLAN mappings. In other embodiments, the system can be configured for providing Virtual Switch Interface Discovery Protocol (VDP) and virtual switch enhancements to accommodate discrepant VNI to VLAN mappings. In another example embodiment, an apparatus is provided that includes a processor, and a memory coupled to the processor, where the apparatus is configured such that if a server is connected through a virtual port channel, a VDP is used to notify the server of different VNI to VLAN mappings. In another embodiment, the apparatus can extend a VDP Filter Info Field to carry a set of VLANs mapped to a VNI, keyed by leaf MAC addresses that serve as bridge identifiers.

公开(公告)号：US20180034747A1

公开(公告)日：2018-02-01

申请号：US15224158

申请日：2016-07-29

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Rajesh Babu Nataraja ,  Shyam Kapadia ,  Lei Fu ,  Nilesh Shah

IPC: H04L12/931 ,  H04L12/24 ,  H04L12/46

CPC classification number: H04L49/70 ,  H04L12/4641 ,  H04L41/0803

Abstract: A method is described and in one embodiment includes receiving at a top-of-rack (“TOR”) switch a notification concerning a virtual machine (“VM”), wherein the received notification identifies a host associated with the VM; determining whether the identified host is directly connected to the TOR switch; and if the identified host is not directly connected to the TOR switch, identifying an intermediate switch to which the identified host is directly connected; and determining whether the identified intermediate switch to which the identified host is directly attached is attached to the TOR switch.

公开(公告)号：US20170317919A1

公开(公告)日：2017-11-02

申请号：US15143202

申请日：2016-04-29

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Rex Emmanuel Fernando ,  Victor Manuel Moreno ,  Shyam Kapadia ,  Liqin Dong ,  Murali Venkateshaiah

IPC: H04L12/761 ,  H04L12/46 ,  H04L29/12

CPC classification number: H04L61/103 ,  H04L12/4633 ,  H04L41/0806 ,  H04L41/12 ,  H04L61/6022

Abstract: A system and a method are disclosed for enabling interoperability between data plane learning endpoints and control plane learning endpoints in an overlay network environment. An exemplary method for managing network traffic in the overlay network environment includes receiving network packets in an overlay network from data plane learning endpoints and control plane learning endpoints, wherein the overlay network extends Layer 2 network traffic over a Layer 3 network; operating in a data plane learning mode when a network packet is received from a data plane learning endpoint; and operating in a control plane learning mode when the network packet is received from a control plane learning endpoint. Where the overlay network includes more than one overlay segment, the method further includes operating as an anchor node for routing inter-overlay segment traffic to and from hosts that operate behind the data plane learning endpoints.