公开(公告)号：US12284117B2

公开(公告)日：2025-04-22

申请号：US17946310

申请日：2022-09-16

Applicant: Juniper Networks, Inc.

Inventor： Vikram Nagarajan ,  Wen Lin ,  Soumyodeep Joarder ,  Muniyappan Suruttaiyan ,  Princy T. Elizabeth ,  Ragupathi J ,  SelvaKumar Sivaraj

IPC: H04L47/125 ,  H04L12/46 ,  H04L47/25

Abstract: A controller device receives, from a plurality of assisted replication network devices, respective utilization information associated with the plurality of assisted replication network devices. The controller device generates, based on the respective utilization information associated with the plurality of assisted replication network devices, load balancing information for a network device associated with two or more assisted replication network devices of the plurality of assisted replication network devices, and sends, to the network device, the load balancing information. The network selects, based on the load balancing information, a particular assisted replication network device of the two or more assisted replication network devices. The network device receives a traffic flow that is to be multicast and sends the traffic flow to the particular assisted replication network device, wherein sending the traffic flow to the particular assisted replication network device permits the particular assisted replication network device to multicast the traffic flow.

公开(公告)号：US20240291753A1

公开(公告)日：2024-08-29

申请号：US18657426

申请日：2024-05-07

Applicant: Juniper Networks, Inc.

Inventor： Prasad Miriyala ,  Wen Lin ,  Suresh Palguna Krishnan ,  SelvaKumar Sivaraj ,  Kumuthini Ratnasingham

IPC: H04L45/00 ,  H04L12/46 ,  H04L45/586 ,  H04L45/74

CPC classification number: H04L45/34 ,  H04L12/4641 ,  H04L45/566 ,  H04L45/586 ,  H04L45/74

Abstract: A plurality of switches may be arranged according to a spine and leaf topology in which each spine switch is connected to all leaf switches. A leaf switch includes a memory configured to store a plurality of policies, each of the plurality of policies being associated with a respective source identifier value and a respective destination address; a network interface communicatively coupled to one of the spine switches; and a processor implemented in circuitry and configured to: receive a packet from the spine switch via the network interface, the packet being encapsulated with a Virtual Extensible Local Area
Network (VXLAN) header; extract a source identifier value from the VXLAN header; determine a destination address for the packet; determine a policy of the plurality of policies to apply to the packet according to the source identifier value and the destination address;
and apply the policy to the packet.

公开(公告)号：US20230095253A1

公开(公告)日：2023-03-30

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

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：US20220385570A1

公开(公告)日：2022-12-01

申请号：US17305117

申请日：2021-06-30

Applicant: Juniper Networks, Inc.

Inventor： Prasad Miriyala ,  Wen Lin ,  Suresh Palguna Krishnan ,  SelvaKumar Sivaraj ,  Kumuthini Ratnasingham

IPC: H04L12/721 ,  H04L12/713 ,  H04L12/741 ,  H04L12/46

Abstract: A plurality of switches may be arranged according to a spine and leaf topology in which each spine switch is connected to all leaf switches. A leaf switch includes a memory configured to store a plurality of policies, each of the plurality of policies being associated with a respective source identifier value and a respective destination address; a network interface communicatively coupled to one of the spine switches; and a processor implemented in circuitry and configured to: receive a packet from the spine switch via the network interface, the packet being encapsulated with a Virtual Extensible Local Area Network (VXLAN) header; extract a source identifier value from the VXLAN header; determine a destination address for the packet; determine a policy of the plurality of policies to apply to the packet according to the source identifier value and the destination address; and apply the policy to the packet.

公开(公告)号：US11323392B1

公开(公告)日：2022-05-03

申请号：US16947099

申请日：2020-07-17

Applicant: Juniper Networks, Inc.

Inventor： Sushant Kumar ,  Aldrin Isaac ,  SelvaKumar Sivaraj

IPC: H04L49/55 ,  H04L43/0811 ,  H04L45/24 ,  H04L45/02 ,  H04L45/16 ,  H04L41/0654 ,  H04L41/0659

Abstract: Techniques are described for managing a split-brain scenario in a multihomed environment by exchanging isolation information between a leaf device and two or more spine devices to which the leaf device is multihomed via a link aggregation group (LAG). The techniques include selecting one of the spine devices as a primary spine device and determining, based on the isolation information, whether the spine devices are isolated from each other. In the split-brain scenario in which all of the spine devices are isolated from each other, the primary spine device is configured to maintain the LAG with the leaf device while the other spine devices mark the LAG with the leaf device as down. In this way, in the split-brain scenario, the leaf device may continue to send traffic to other leaf devices in the leaf layer using the LAG to the primary spine device.

公开(公告)号：US11088871B1

公开(公告)日：2021-08-10

申请号：US16788072

申请日：2020-02-11

Applicant: Juniper Networks, Inc.

Inventor： Wen Lin ,  Ravi Shekhar ,  Vamshi Krishna Voruganti ,  Aldrin Isaac ,  SelvaKumar Sivaraj ,  Sean A. Mentzer ,  John E. Drake

IPC: H04L12/46 ,  H04L29/12 ,  H04L12/66 ,  H04L12/723

Abstract: A first provider edge device may receive device information from a second provider edge device included in an Ethernet virtual private network (EVPN). The device information may identify a media access control (MAC) address and may indicate that the device is connected to the second provider edge device. The first provider edge device may receive data transmitted by the device and may determine, based on information included in the data, that the device has moved from the second provider edge device to the first provider edge device. The first provider edge device may generate a data packet including mobility information indicating that the device has moved to the first provider edge device. The first provider edge device may transmit, via a data plane of the EVPN, the data packet to the second provider edge device to permit the second provider edge device to update routing information for the device.

公开(公告)号：US20210211372A1

公开(公告)日：2021-07-08

申请号：US16777526

申请日：2020-01-30

Applicant: Juniper Networks, Inc.

Inventor： Wen Lin ,  Yi Zheng ,  SelvaKumar Sivaraj ,  Vasudevan Venkatraman ,  Prabhu Raj V.K. ,  Channasangamesh S. Hugar

IPC: H04L12/729 ,  H04L12/707 ,  H04L12/717 ,  H04L12/723 ,  H04L29/06 ,  H04L12/46

Abstract: The problem of looping at the egress of a transport network with a CE multihomed to a protected egress PE and a backup/protector egress PE can be avoided by (a) enabling the protector egress PE to distinguish between fast reroute (FRR) traffic coming from the protected egress PE and normal known unicast (KU) traffic coming from a PE of the transport network that is not attached to the same multihomed segment; (b) receiving, by the protector egress PE, known unicast data, to be forwarded to the CE; (c) determining, by the protector egress PE, that a link between it and the CE is unavailable; and (d) responsive to determining that the link between the protector egress PE and the CE is unavailable, (1) determining whether the known unicast traffic received was sent from the protected egress PE or from another PE of the transport network that is not attached to the same multihomed segment, and (2) responsive to a determination that the known unicast traffic received was sent from the protected egress PE, discarding the known unicast traffic received, and otherwise, responsive to a determination that the known unicast (KU) traffic received was sent from another PE of the transport network that is not attached to the same multihomed segment, sending the known multicast traffic, via a backup tunnel, to an egress PE which protects the protector egress PE.

公开(公告)号：US10666500B2

公开(公告)日：2020-05-26

申请号：US15085533

申请日：2016-03-30

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：US20170288948A1

公开(公告)日：2017-10-05

申请号：US15085533

申请日：2016-03-30

Applicant: Juniper Networks, Inc.

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

IPC: H04L12/24 ,  H04L12/703 ,  H04L12/721 ,  H04L12/723 ,  H04L12/741

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.