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：US20180013654A1

公开(公告)日：2018-01-11

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: H04L12/26 ,  H04L12/46 ,  H04L12/24 ,  H04L29/08

CPC classification number: H04L67/18 ,  H04L12/4641 ,  H04L41/0856 ,  H04L41/12

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：US20170171057A1

公开(公告)日：2017-06-15

申请号：US15043079

申请日：2016-02-12

Applicant: Cisco Technology, Inc.

Inventor： Liqin Dong ,  Shyam Kapadia ,  Neeraj Malhotra ,  Richard Lam ,  Lukas Krattiger

IPC: H04L12/751

CPC classification number: H04L45/02

Abstract: Presented herein are methods for advertising an IP prefix to address the connectivity problem in multi-chassis link aggregation scenario. A peer switch will advertise two VTEP addresses. It will use a physical IP (PIP) address as a next hop (NH) for a prefix route, while continuing to use a VIP for host IP and MAC route advertisement. A new virtual MAC is introduced and it is derived from the VIP as the router MAC associated with VIP. A switch is made to use a VIP for prefix advertisement when a device detects that the same prefix is reachable both locally and from its peer. This saves adjacency entries consumed in the remote VTEPs. These techniques fix the connectivity issue for prefix routes that is exposed with current EVPN, without requiring any additional adjacency resource consumption.

公开(公告)号：US09985867B2

公开(公告)日：2018-05-29

申请号：US15043079

申请日：2016-02-12

Applicant: Cisco Technology, Inc.

Inventor： Liqin Dong ,  Shyam Kapadia ,  Neeraj Malhotra ,  Richard Lam ,  Lukas Krattiger

IPC: H04L12/751

CPC classification number: H04L45/02

Abstract: Presented herein are methods for advertising an IP prefix to address the connectivity problem in multi-chassis link aggregation scenario. A peer switch will advertise two VTEP addresses. It will use a physical IP (PIP) address as a next hop (NH) for a prefix route, while continuing to use a VIP for host IP and MAC route advertisement. A new virtual MAC is introduced and it is derived from the VIP as the router MAC associated with VIP. A switch is made to use a VIP for prefix advertisement when a device detects that the same prefix is reachable both locally and from its peer. This saves adjacency entries consumed in the remote VTEPs. These techniques fix the connectivity issue for prefix routes that is exposed with current EVPN, without requiring any additional adjacency resource consumption.

公开(公告)号：US20190037033A1

公开(公告)日：2019-01-31

申请号：US15661445

申请日：2017-07-27

Applicant: Cisco Technology, Inc.

Inventor： Elyor Khakimov ,  Shyam Kapadia ,  Richard Lam

IPC: H04L29/08 ,  H04L12/813 ,  H04L12/44 ,  H04L12/803

Abstract: A network controller for a network implementing a virtual network overlay determines a network gateway via which a service appliance accesses the network. The network controller determines a network gateway via which an application server accesses the network. The network controller distributes first policy data to the network gateway via which the service appliance accesses the network. This first policy data indicates a network policy such that when the policy is executed, the network gateway via which the service appliance accesses the network is configured to forward return packets addressed to a client device sent from an application server to the service appliance. The network controller distributes second policy data to the network gateway via which the application server accesses the network. This second policy data indicates a network policy such that when the policy is executed, the network gateway via which the application server accesses the network is configured to forward return packets addressed to the client device sent from the application server to the network gateway via which the service appliance accesses the network.