公开(公告)号：WO2022081356A1

公开(公告)日：2022-04-21

申请号：PCT/US2021/053188

申请日：2021-10-01

Applicant: CISCO TECHNOLOGY, INC.

Inventor： NADIPALLY, Ramchander R. ,  CHOUTHAI, Ajinkya Abhay ,  VENKATRAMAN, Rajagopal ,  LI, Xiangqun ,  KACHALIA, Rahul

IPC: H04L12/46 ,  H04L45/00 ,  H04L61/5014

Abstract: This technology enables a dynamic host configuration protocol ("DHCP") Layer 2 relay in a Virtual Extensible Local Area Network ("VXLAN") overlay fabric. A host device broadcasts a configuration request, such as a DHCP discover, across an Ethernet virtual private network ("EVPN") overlay fabric. The DHCP discover is intercepted by a VXLAN Tunnel End Point ("VTEP") device with Layer 2 bridging functionality. The VTEP device selects a centralized gateway ("CGW") device with Layer 3 relay functionality as a destination for the DHCP discover. The VTEP device encapsulates the DHCP discover with a unicast VXLAN header comprising the media access control ("MAC") address of the CGW device and transmits the encapsulated DHCP discover to the CGW device, resolving the destination address associated with the broadcast. The CGW device transmits the DHCP discover to an Internet Protocol ("IP") address associated with a DHCP server that is external to the EVPN overlay fabric.

公开(公告)号：WO2023034805A1

公开(公告)日：2023-03-09

申请号：PCT/US2022/075675

申请日：2022-08-30

Applicant: CISCO TECHNOLOGY, INC.

Inventor： VENKATRAMAN, Rajagopal ,  KUMAR, Rajeev ,  KOBO, Roberto Mitsuo ,  AGARWAL, Vikash

IPC: H04L43/0811 ,  H04L43/10 ,  H04L43/50 ,  H04L12/46

Abstract: In one embodiment, network node-to-node connectivity verification is performed in a network including data path processing of packets within a packet switching device. In one embodiment, an echo request connectivity test packet, emulating an echo request connectivity test packet received from a first connected network node, is inserted by the packet switching device prior in its data processing path prior to ingress processing performed for packets received from the first connected network node. A correspondingly received echo reply connectivity test packet is intercepted by the packet switching device during data path egress processing performed for packets to be forwarded to the first connected network node.

公开(公告)号：WO2023283172A1

公开(公告)日：2023-01-12

申请号：PCT/US2022/036087

申请日：2022-07-05

Applicant: CISCO TECHNOLOGY, INC.

Inventor： KUMAR, Rajeev ,  VENKATRAMAN, Rajagopal

IPC: H04L12/18

Abstract: A method may include bridging in, via a fabric, a multicast data packet from a source device to a first edge device of a plurality of edge devices and flooding the multicast data packet to the plurality of edge devices within a mutual subnetwork of the fabric. The method further includes bridging out the multicast data packet from a second edge device of the plurality of edge devices to a receiving device. The source device and the receiving device are located within the mutual subnetwork.