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：US20220272027A1

公开(公告)日：2022-08-25

申请号：US17249163

申请日：2021-02-22

Applicant: Juniper Networks, Inc.

Inventor： Wen Lin ,  John E. Drake

IPC: H04L12/761 ,  H04L12/823 ,  H04L12/707 ,  H04L12/723 ,  H04L12/751

Abstract: Techniques are described for providing fast reroute for BUM traffic in EVPN. For example, a first provider edge (PE) device, elected as a designated forwarder (DF) of an Ethernet segment, configures a backup path using a label received from a second PE device of the Ethernet segment (e.g., backup DF) that identifies the second PE device as a “protector” of the Ethernet segment. For example, a routing component of the DF configures within a forwarding component a backup path to the second PE device, e.g., installing the label and operation(s) within the forwarding component to cause the forwarding component to add the label to BUM packets received from a core network. Therefore, when an access link to the local CE device has failed, the DF reroutes BUM packets from the core network via the backup path to the second PE device, which sends the BUM packets to the CE device.

公开(公告)号：US11115330B2

公开(公告)日：2021-09-07

申请号：US15957345

申请日：2018-04-19

Applicant: Juniper Networks, Inc.

Inventor： Selvakumar Sivaraj ,  Wen Lin ,  Praful Lalchandani ,  Aldrin Isaac ,  Deepti J. Chandra ,  Vishal Garg

IPC: H04L12/741 ,  H04L12/46 ,  H04L12/24 ,  H04L29/12 ,  H04L29/08 ,  H04L12/721 ,  H04L12/761 ,  H04L12/707 ,  H04L12/723 ,  H04L12/18

Abstract: A device may receive, from a provider edge device, a packet to be provided to one or more other provider edge devices. Some of the one or more other provider edge devices may be multi-homed with a same customer edge device as the provider edge device. The device may configure a source IP address of the packet based on a capability of an assisted replicator device after receiving the packet. The capability may relate to whether the assisted replicator device is capable of retaining the source IP address of the packet as received from the provider edge device. The device may provide the packet to at least some provider edge devices, of the one or more other provider edge devices, after configuring the source IP address of the packet.

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：US20200322183A1

公开(公告)日：2020-10-08

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: H04L12/46 ,  H04L12/703 ,  H04L12/709 ,  H04L12/723 ,  H04L12/26 ,  H04L12/721

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：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：US10291532B1

公开(公告)日：2019-05-14

申请号：US15637521

申请日：2017-06-29

Applicant: Juniper Networks, Inc.

Inventor： Maruthi Kishore Tiruveedhula ,  Wen Lin

IPC: H04L12/66 ,  H04L12/803 ,  H04L12/721 ,  H04L12/46 ,  H04L12/713 ,  H04L29/12

Abstract: A network device may receive first route information from an Ethernet virtual private network (EVPN) device and/or a provider backbone bridging EVPN (PBB-EVPN) device. The network device may generate second route information based on the first route information. The network device may provide the second route information to permit network traffic to be transferred between the EVPN device and the PBB-EVPN device. The network device may receive the network traffic to be transferred between the EVPN device and the PBB-EVPN device after providing the second route information. The network device may modify the network traffic to be compatible with the EVPN device or the PBB-EVPN device after receiving the network traffic. The network device may provide the network traffic between the EVPN device and the PBB-EVPN device after modifying the network traffic.

公开(公告)号：US10116464B2

公开(公告)日：2018-10-30

申请号：US14675202

申请日：2015-03-31

Applicant: Juniper Networks, Inc.

Inventor： Wen Lin ,  John E. Drake ,  Zhaohui Zhang

IPC: H04L12/46 ,  H04L12/18 ,  H04L12/761 ,  H04L12/721

Abstract: The techniques of this disclosure may improve multicast forwarding in an Ethernet Virtual Private Network when delivering multicast traffic to receivers on a different IP subnet than the multicast source. A method may include configuring first and second layer-2 domains to forward network traffic; configuring a first layer-3 Integrated Routing and Bridging (IRB) interface for the first layer-2 domain and a second layer-3 IRB interface for the second layer 2 domain; receiving a multicast packet from a multicast source device, the multicast source device being included in the first layer-2 domain, the multicast packet having a multicast receiver device in the second layer-2 domain; and forwarding, using the first and second layer-3 IRB interfaces, the multicast packet to the multicast receiver device, without receiving the multicast packet from another provider edge router that has been elected as the designated router on the second IRB interface for the second layer-2 domain.