公开(公告)号：US10601704B2

公开(公告)日：2020-03-24

申请号：US16019466

申请日：2018-06-26

Applicant: Cisco Technology, Inc.

Inventor： Himanshu Shah

IPC: H04L12/28 ,  H04L12/721 ,  H04L12/46

Abstract: In some examples, an example method to minimize asymmetric routing at a network node may include maintaining a flow table including one or more records, each record indicating a packet flow and a corresponding tunnel, receiving a data packet to process at a network node, and determining whether to process the data packet as a follower node. The method may also include, responsive to a determination to process the data packet as a follower node, determining whether there is an entry in the flow table for a packet flow associated with the received packet, and, responsive to a determination that there is an entry in the flow table for the packet flow, transmitting the received data packet through a tunnel corresponding to the packet flow.

公开(公告)号：US11240147B2

公开(公告)日：2022-02-01

申请号：US16823569

申请日：2020-03-19

Applicant: Cisco Technology, Inc.

Inventor： Himanshu Shah

IPC: H04L12/28 ,  H04L12/721 ,  H04L12/46

Abstract: In some examples, an example method to minimize asymmetric routing at a network node may include maintaining a flow table including one or more records, each record indicating a packet flow and a corresponding tunnel, receiving a data packet to process at a network node, and determining whether to process the data packet as a follower node. The method may also include, responsive to a determination to process the data packet as a follower node, determining whether there is an entry in the flow table for a packet flow associated with the received packet, and, responsive to a determination that there is an entry in the flow table for the packet flow, transmitting the received data packet through a tunnel corresponding to the packet flow.

公开(公告)号：US20210243095A1

公开(公告)日：2021-08-05

申请号：US17239361

申请日：2021-04-23

Applicant: Cisco Technology, Inc.

Inventor： Murtuza Attarwala ,  Lars Olof Stefan Olofsson ,  Himanshu Shah

IPC: H04L12/26 ,  H04L12/851 ,  H04L29/12 ,  H04L12/725 ,  H04L12/707 ,  H04L12/729 ,  H04L12/721

Abstract: A method may include receiving a domain name system (DNS) query at a network device, where the DNS query may be associated with a traffic flow identified for rerouting through an alternative path utilizing an alternative network device instead of a default path. The method may also include rewriting the DNS query such that the DNS query is routed through the alternative network device along the alternative path and to a DNS server associated with the alternative path. The method may additionally include receiving a DNS response from the DNS server, where a resource identified in the DNS response may be based on the DNS query coming through the alternative network device.