公开(公告)号：US20210392069A1

公开(公告)日：2021-12-16

申请号：US17343697

申请日：2021-06-09

Applicant: Cisco Technology, Inc.

Inventor： Samir Thoria ,  Neeraj Malhotra ,  Lukas Krattiger ,  Ali Sajassi ,  Rajesh Sharma ,  Kesavan Thiruvenkatasamy ,  Aparna Pattekar

IPC: H04L12/715 ,  H04L12/46

Abstract: This disclosure describes techniques for enabling interoperability between asymmetric and symmetric Integrated Routing and Bridging (IRB) modes. An interfacing component may be configured to receive a first route advertisement from a first edge node in a Layer-2 (L2) fabric. The first route advertisement may correspond to an asymmetric format route, for instance. The interfacing component may be further configured to receive a second route advertisement from a second edge node in a L2/Layer-3 (L3) fabric. The second edge node may be configured for symmetric integrated routing and bridging (IRB). The interfacing component may be configured to re-originate the first route and the second route such that the interfacing component is included as a hop in the resultant routes between the L2 fabric and the L2/L3 fabric.

公开(公告)号：US20240137305A1

公开(公告)日：2024-04-25

申请号：US18401208

申请日：2023-12-29

Applicant: Cisco Technology, Inc.

Inventor： Samir D Thoria ,  Ali Sajassi ,  Rajesh Sharma ,  Kesavan Thiruvenkatasamy ,  Aparna Pattekar ,  Lukas Krattiger ,  Neeraj Malhotra

IPC: H04L45/02 ,  H04L12/46

CPC classification number: H04L45/04 ,  H04L12/46

Abstract: This disclosure describes techniques for enabling interoperability between asymmetric and symmetric Integrated Routing and Bridging (IRB) modes. An interfacing component may be configured to receive a first route advertisement from a first edge node in a Layer-2 (L2) fabric. The first route advertisement may correspond to an asymmetric format route, for instance. The interfacing component may be further configured to receive a second route advertisement from a second edge node in a L2/Layer-3 (L3) fabric. The second edge node may be configured for symmetric integrated routing and bridging (IRB). The interfacing component may be configured to re-originate the first route and the second route such that the interfacing component is included as a hop in the resultant routes between the L2 fabric and the L2/L3 fabric.

公开(公告)号：US11962516B1

公开(公告)日：2024-04-16

申请号：US18162173

申请日：2023-01-31

Applicant: Cisco Technology, Inc.

Inventor： Ayan Banerjee ,  Saikat Bhattacharya ,  Ramesh Sivakolundu ,  Ravikanth Nasika ,  Rajesh Sharma

IPC: H04L49/00 ,  H04L43/028 ,  H04L43/12 ,  H04L45/7453

CPC classification number: H04L49/30 ,  H04L43/028 ,  H04L43/12 ,  H04L45/7453

Abstract: Techniques to eliminate duplicate packets from a stream of packets. A method includes receiving a packet, hashing elements of the packet to obtain a packet partial signature, generating an action data value by appending, to the packet partial signature, unhashed packet information, accessing a hash store location in a hash store based on the action data value, determining, based on data stored at the hash store location, whether the packet is a duplicate of a previously-received packet, and based on whether the packet is a duplicate of a previously-received packet, one of allowing and preventing one of the packet and a copy of the packet to reach a downstream 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：US11025539B1

公开(公告)日：2021-06-01

申请号：US16102851

申请日：2018-08-14

Applicant: Cisco Technology, Inc.

Inventor： Samar Sharma ,  Rajesh Sharma

IPC: H04L12/46 ,  H04L12/725 ,  H04L12/715 ,  H04L12/721 ,  H04L12/743

Abstract: Presented herein are techniques to support service chains in a network, such as a spine-leaf switch fabric network, that also uses overlay networking technology. More specifically, in accordance with the techniques presented herein, a linecard at an ingress network node for an overlay network is configured to receive a packet. Using information obtained from the packet, a hardware lookup is performed at the linecard to identify a service chain with which the packet is associated. An entry corresponding to the identified service chain is identified within a memory location of the linecard, where the entry includes overlay network information for forwarding packets along the identified service chain via an overlay network. Using the overlay network information included in the identified entry, the packet is encapsulated with an overlay packet header for use in forwarding the packet via the overlay network.

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：US11924083B2

公开(公告)日：2024-03-05

申请号：US17343697

申请日：2021-06-09

Applicant: Cisco Technology, Inc.

Inventor： Samir Thoria ,  Neeraj Malhotra ,  Lukas Krattiger ,  Ali Sajassi ,  Rajesh Sharma ,  Kesavan Thiruvenkatasamy ,  Aparna Pattekar

IPC: H04L45/02 ,  H04L12/46

CPC classification number: H04L45/04 ,  H04L12/46

Abstract: This disclosure describes techniques for enabling interoperability between asymmetric and symmetric Integrated Routing and Bridging (IRB) modes. An interfacing component may be configured to receive a first route advertisement from a first edge node in a Layer-2 (L2) fabric. The first route advertisement may correspond to an asymmetric format route, for instance. The interfacing component may be further configured to receive a second route advertisement from a second edge node in a L2/Layer-3 (L3) fabric. The second edge node may be configured for symmetric integrated routing and bridging (IRB). The interfacing component may be configured to re-originate the first route and the second route such that the interfacing component is included as a hop in the resultant routes between the L2 fabric and the L2/L3 fabric.

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：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：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.