公开(公告)号：US12010011B2

公开(公告)日：2024-06-11

申请号：US18060521

申请日：2022-11-30

Applicant: Juniper Networks, Inc.

Inventor： Wen Lin ,  Yi Zheng ,  Mukesh Kumar ,  Xichun Hong ,  Selvakumar Sivaraj ,  Vamshi Krishna Voruganti ,  John E. Drake

IPC: H04L45/28 ,  H04L12/46 ,  H04L41/0668

CPC classification number: H04L45/28 ,  H04L12/4633 ,  H04L12/4675 ,  H04L41/0668

Abstract: Techniques are described for providing fast reroute for traffic in EVPN-VXLAN. For example, a backup PE device of an Ethernet segment is configured with an additional tunnel endpoint address (“reroute tunnel endpoint address”) for a backup path associated with a second split-horizon group that is different than a tunnel endpoint address and first split-horizon group for another path used for normal traffic forwarding. The backup PE device sends the reroute tunnel endpoint address to a primary PE device of the Ethernet segment, which uses the reroute tunnel endpoint address to configure a backup path to the backup PE device over the core network. For example, the primary PE device may install the reroute tunnel endpoint address within its forwarding plane and one or more operations to cause the primary PE device to encapsulate a VXLAN header including the reroute tunnel endpoint address when rerouting the packet along the backup path.

公开(公告)号：US11902160B2

公开(公告)日：2024-02-13

申请号：US17452309

申请日：2021-10-26

Applicant: Juniper Networks, Inc.

Inventor： Wen Lin ,  Manish Gupta ,  Shivakumar Channalli ,  Vinay K Nallamothu

IPC: H04L12/741 ,  H04L45/745 ,  H04L12/46 ,  H04L49/25

CPC classification number: H04L45/745 ,  H04L12/4633 ,  H04L12/4641 ,  H04L49/25

Abstract: Techniques for EVPN Host Routed Bridging (HRB) and EVPN cloud-native data center with Host Routed Bridging (HRB) are described. A host computing device of a data center includes one or more containerized user-level applications. A cloud native virtual router is configured for dynamic deployment by the data center application orchestration engine and operable in a user space of the host computing device. Processing circuitry is configured for execution of the containerized user-level applications and the cloud native virtual router. The cloud native virtual router comprises a containerized routing protocol process configured to operate as a control plane, and a data plane for the containerized router. The data plane is configured to operate an ethernet virtual private network (EVPN) encapsulation/decapsulation data path of an overlay network for communicating layer two (L2) network traffic of the containerized user applications over a switch fabric of the data center.

公开(公告)号：US11876706B2

公开(公告)日：2024-01-16

申请号：US17744335

申请日：2022-05-13

Applicant: Juniper Networks, Inc.

Inventor： Kireeti Kompella ,  Wen Lin ,  Kevin Wang

IPC: H04L45/50 ,  H04L12/46 ,  H04L45/18 ,  H04L45/00 ,  H04L69/22

CPC classification number: H04L45/507 ,  H04L12/4633 ,  H04L45/18 ,  H04L45/20 ,  H04L45/22 ,  H04L69/22

Abstract: In some cases, once Fast Reroute (FRR) has taken place (e.g., for MPLS protection), a further FRR is undesirable, and even detrimental. A mechanism to prevent a further FRR, once such a further FRR is determined to be potentially harmful, is described.

公开(公告)号：US20220272034A1

公开(公告)日：2022-08-25

申请号：US17744335

申请日：2022-05-13

Applicant: Juniper Networks, Inc.

Inventor： Kireeti Kompella ,  Wen Lin ,  Kevin Wang

IPC: H04L45/50 ,  H04L12/46 ,  H04L45/18 ,  H04L45/00 ,  H04L69/22

Abstract: In some cases, once Fast Reroute (FRR) has taken place (e.g., for MPLS protection), a further FRR is undesirable, and even detrimental. A mechanism to prevent a further FRR, once such a further FRR is determined to be potentially harmful, is described.

公开(公告)号：US11362942B2

公开(公告)日：2022-06-14

申请号：US16779413

申请日：2020-01-31

Applicant: Juniper Networks, Inc.

Inventor： Kireeti Kompella ,  Wen Lin ,  Kevin Wang

IPC: H04L45/50 ,  H04L12/46 ,  H04L45/18 ,  H04L45/00 ,  H04L69/22

Abstract: In some cases, once Fast Reroute (FRR) has taken place (e.g., for MPLS protection), a further FRR is undesirable, and even detrimental. A mechanism to prevent a further FRR, once such a further FRR is determined to be potentially harmful, is described.

公开(公告)号：US11310145B1

公开(公告)日：2022-04-19

申请号：US17005985

申请日：2020-08-28

Applicant: Juniper Networks, Inc.

Inventor： Wen Lin ,  John E. Drake

IPC: H04L12/751 ,  H04L12/741 ,  H04L12/721 ,  H04L45/02 ,  H04L45/00 ,  H04L45/12

Abstract: A disclosed method may include (1) identifying, by a PE router, a conditional advertisement policy that requires installation of at least one address of an active service appliance within a routing table to trigger advertising a route for the active service appliance to one or more additional PE routers, (2) inspecting the routing table for the installation of the address of the active service appliance, (3) determining, based at least in part on the inspection, that the address of the active service appliance is installed in the routing table, (4) determining that the PE router has satisfied the conditional advertisement policy due at least in part to the address of the active service appliance being installed in the routing table, and then in response, (5) directing the PE router to advertise the route to the additional PE routers. Various other apparatuses, systems, and methods are also disclosed.

公开(公告)号：US11296908B2

公开(公告)日：2022-04-05

申请号：US16907908

申请日：2020-06-22

Applicant: Juniper Networks, Inc.

Inventor： Wen Lin ,  Pankaj Kumar Gupta ,  Babu Singarayan ,  Sharmila Koppula ,  Manish Gupta ,  Kapil Arora

IPC: G06F15/16 ,  H04L12/46 ,  H04L45/28 ,  H04L45/24 ,  H04L45/50 ,  H04L43/0817 ,  H04L45/00

Abstract: Techniques are disclosed for an Ethernet Virtual Private Network (EVPN) Virtual Private Wire Service (VPWS) network with service interface-aware forwarding. In one example, a first network device signals to a second network device, using EVPN route advertisements, a multi-service service tunnel to transport network packets for a plurality of services. The services are identifiable by virtual local area network (VLAN) identifiers in the packets. The first network device is configured with a single transport interface for the service tunnel and the single transport interface is configured with respective service interfaces for the services. The first network device detects failure of a failed service interface of the service interfaces and outputs, in response to the failure, an EVPN route withdrawal message for the service tunnel that identifies the service corresponding to the failed service interface.

公开(公告)号：US20210203598A1

公开(公告)日：2021-07-01

申请号：US16779413

申请日：2020-01-31

Applicant: Juniper Networks, Inc.

Inventor： Kireeti Kompella ,  Wen Lin ,  Kevin Wang

IPC: H04L12/723 ,  H04L12/707 ,  H04L12/46 ,  H04L12/733 ,  H04L12/705 ,  H04L29/06

Abstract: In some cases, once Fast Reroute (FRR) has taken place (e.g., for MPLS protection), a further FRR is undesirable, and even detrimental. A mechanism to prevent a further FRR, once such a further FRR is determined to be potentially harmful, is described.

公开(公告)号：US10999126B2

公开(公告)日：2021-05-04

申请号：US16881507

申请日：2020-05-22

Applicant: Juniper Networks, Inc.

Inventor： Tapraj Singh ,  Wen Lin ,  SelvaKumar Sivaraj ,  Rukesh Dorai ,  Sunesh Rustagi

IPC: H04L12/24 ,  H04L12/723 ,  H04L12/741 ,  H04L12/721 ,  H04L12/703 ,  H04L12/46 ,  H04L12/707 ,  H04L12/26

Abstract: Techniques are described for avoiding traffic black-holing in a multi-homed Ethernet virtual private networks (EVPNs) in which a customer device (CE) is multi-homed to a plurality of multi-homing provider edge devices (PEs) via respective links of an Ethernet segment. An overlay network is created over the Ethernet segment, and the multi-homing PEs of the EVPN are configured with a common anycast IP address for respective virtual network interfaces. Upon election as active designated forwarder (DF) for the EVPN, the DF PE of the multi-homing PEs advertises toward the customer network an IGP metric for the anycast IP address that is lower than the IGP metric(s) advertised by any of the non-DF standby PE routers segment to direct the CE to forward network packets from the customer network to the DF PE over the respective link of the Ethernet segment.

公开(公告)号：US10587488B2

公开(公告)日：2020-03-10

申请号：US16024381

申请日：2018-06-29

Applicant: Juniper Networks, Inc.

Inventor： Gowri Shankar Ramanarayanan ,  Selvakumar Sivaraj ,  Wen Lin

IPC: H04L12/26 ,  H04L12/46 ,  H04L12/24 ,  H04L12/721 ,  H04L12/723

Abstract: A network device may generate a route advertisement that includes a media access control (MAC) address. The MAC address may correspond to a data link established between the network device and a customer edge (CE) device. The network device and the CE device may be associated with an Ethernet virtual private network (EVPN) that includes other network devices that are remote from the CE device. The network device may cause the route advertisement to be outputted over the EVPN. The route advertisement may permit the other network devices to learn that the data link is directly reachable via the MAC address, and may permit the other network devices, when configured as maintenance endpoints (MEPs), to directly address performance monitoring-related unicast packets, intended for the data link, using the MAC address, such that flooding of the performance monitoring-related unicast packets is avoided.