公开(公告)号：US20200296039A1

公开(公告)日：2020-09-17

申请号：US16886973

申请日：2020-05-29

Applicant: Cisco Technology, Inc.

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

IPC: H04L12/741 ,  H04L12/713

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：US20180139127A1

公开(公告)日：2018-05-17

申请号：US15354379

申请日：2016-11-17

Applicant: Cisco Technology, Inc.

Inventor： Sathish Srinivasan ,  Vrishabha Sikand ,  Shyam N. Kapadia ,  Upendra N. Moholkar

IPC: H04L12/753 ,  H04L12/24 ,  H04L12/44 ,  H04L12/741

CPC classification number: H04L45/48 ,  H04L12/44 ,  H04L41/12 ,  H04L45/745

Abstract: A border leaf of a software defined computer network receives network traffic directed to a first endpoint from a second endpoint. The first endpoint is connected to the software defined network, and the second endpoint is external to the software defined network. If the border leaf determines that it does not have a stored network route for an active conversation between the first endpoint and the second endpoint, the border leaf determines a valid network route for the network traffic to reach the first endpoint. The border leaf stores the valid network route and forwards the network traffic to the first endpoint. The border leaf transmits a synchronization message to other border leaf nodes of the computer network. The synchronization message causes the other border leaf(s) to store the valid network route and an indication that the original border leaf is forwarding the network traffic in the active conversation.

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：US10313224B2

公开(公告)日：2019-06-04

申请号：US15263556

申请日：2016-09-13

Applicant: Cisco Technology, Inc.

Inventor： Sathish Srinivasan ,  Vrishabha Sikand ,  Shyam N. Kapadia ,  Lukas Krattiger ,  Massimiliano Ardica

IPC: H04L12/46 ,  H04L29/12 ,  H04L12/721 ,  H04L12/751

Abstract: Presented herein are techniques to enable seamless mobility of hosts (endpoints) between disaggregated Ethernet virtual private network (EVPN) domains that are connected with one another by an external network (e.g., a Wide-Area Network (WAN)). In one example, a leaf node in the first domain, which was previously connected to a host, receives updated routing information for the host. The leaf node performs a local host verification process to confirm that the host has moved and, in response to confirming that that the host has moved, the first leaf node sends a targeted host announcement message to the host in the second domain.

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：US10673736B2

公开(公告)日：2020-06-02

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 ,  H04L12/46 ,  H04L12/715 ,  H04L29/12

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：US20190166048A1

公开(公告)日：2019-05-30

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

CPC classification number: H04L45/745 ,  H04L12/4641 ,  H04L45/586 ,  H04L63/0272

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：US10158564B2

公开(公告)日：2018-12-18

申请号：US15354379

申请日：2016-11-17

Applicant: Cisco Technology, Inc.

Inventor： Sathish Srinivasan ,  Vrishabha Sikand ,  Shyam N. Kapadia ,  Upendra N. Moholkar

IPC: H04L12/28 ,  H04L12/753 ,  H04L12/24 ,  H04L12/44 ,  H04L12/741

Abstract: A border leaf of a software defined computer network receives network traffic directed to a first endpoint from a second endpoint. The first endpoint is connected to the software defined network, and the second endpoint is external to the software defined network. If the border leaf determines that it does not have a stored network route for an active conversation between the first endpoint and the second endpoint, the border leaf determines a valid network route for the network traffic to reach the first endpoint. The border leaf stores the valid network route and forwards the network traffic to the first endpoint. The border leaf transmits a synchronization message to other border leaf nodes of the computer network. The synchronization message causes the other border leaf(s) to store the valid network route and an indication that the original border leaf is forwarding the network traffic in the active conversation.

公开(公告)号：US20180077047A1

公开(公告)日：2018-03-15

申请号：US15263556

申请日：2016-09-13

Applicant: Cisco Technology, Inc.

Inventor： Sathish Srinivasan ,  Vrishabha Sikand ,  Shyam N. Kapadia ,  Lukas Krattiger ,  Massimiliano Ardica

IPC: H04L12/751 ,  H04L12/46 ,  H04L12/721 ,  H04L29/12

CPC classification number: H04L45/02 ,  H04L12/4641 ,  H04L45/66 ,  H04L61/103 ,  H04L61/6022

Abstract: Presented herein are techniques to enable seamless mobility of hosts (endpoints) between disaggregated Ethernet virtual private network (EVPN) domains that are connected with one another by an external network (e.g., a Wide-Area Network (WAN)). In one example, a leaf node in the first domain, which was previously connected to a host, receives updated routing information for the host. The leaf node performs a local host verification process to confirm that the host has moved and, in response to confirming that that the host has moved, the first leaf node sends a targeted host announcement message to the host in the second domain.