公开(公告)号：US10924332B2

公开(公告)日：2021-02-16

申请号：US16217670

申请日：2018-12-12

Applicant: Juniper Networks, Inc.

Inventor： Kapil Arora ,  Vikram Nagarajan ,  Robert W. Kebler ,  Princy T. Elizabeth ,  Ramesh Kandula ,  Soumyodeep Joarder

IPC: H04L12/24 ,  H04L12/18

Abstract: Techniques are described for facilitating node protection for Broadcast, unknown Unicast, and Multicast (BUM) traffic for a multi-homed node failure. For example, multi-homed provider edge (PE) devices each advertise egress node protection labels to an ingress PE device. In the event one of the multi-homed PE devices fails, the ingress PE device sends a BUM packet including the egress node protection labels for the failed node. When an egress PE device receives the BUM packet, the egress PE device determines whether the BUM packet includes the egress node protection labels and whether the egress PE device is operating as a backup designated forwarder (DF) on an Ethernet segment identifier (ESI) for which the failed node was the DF. If the BUM packet includes the egress node protection labels and the egress PE device is operating as a backup DF, the egress PE device forwards the BUM traffic to the ESI.

公开(公告)号：US10771317B1

公开(公告)日：2020-09-08

申请号：US16189408

申请日：2018-11-13

Applicant: Juniper Networks, Inc.

Inventor： Soumyodeep Joarder ,  Kapil Arora ,  Sunil Kumar Malali ,  Vikram Nagarajan

IPC: H04L12/24 ,  H04L12/703 ,  H04L12/911 ,  H04L12/931 ,  H04L12/851

Abstract: A first network device permits a bidirectional forwarding detection (BFD) session with a second network device. The first network device is a designated forwarder for a third network device, a first link is provided between the first network device and the third network device, the second network device is a backup designated forwarder for the third network device, a second link is provided between the second network device and the third network device. The first network device detects a link failure associated with the first link between the first network device and the third network device, and provides, via the BFD session, a BFD message to the second network device. The BFD message includes an indication of the link failure, and the BFD message is to cause the second network device to be a new designated forwarder for the third network device.

公开(公告)号：US20200177401A1

公开(公告)日：2020-06-04

申请号：US16779948

申请日：2020-02-03

Applicant: Juniper Networks, Inc.

Inventor： Robert W. Kebler ,  Vikram Nagarajan

IPC: H04L12/18 ,  H04L12/701 ,  H04L29/06 ,  H04L12/761 ,  H04L12/44

Abstract: In general, techniques are described for enabling a network of network devices (or “nodes”) to provide redundant multicast streams from redundant multicast sources to an egress network node. In some examples, the egress network node (or a controller for the network) computes maximally redundant trees (MRTs) from the egress network node to a virtual proxy node virtually added to the network topology by the egress network node for redundant multicast sources of redundant multicast streams.

公开(公告)号：US10554425B2

公开(公告)日：2020-02-04

申请号：US15663566

申请日：2017-07-28

Applicant: Juniper Networks, Inc.

Inventor： Robert W. Kebler ,  Vikram Nagarajan

IPC: H04L12/18 ,  H04L12/44 ,  H04L12/761 ,  H04L29/06 ,  H04L12/40 ,  H04L12/721 ,  H04W40/02

Abstract: In general, techniques are described for enabling a network of network devices (or “nodes”) to provide redundant multicast streams from redundant multicast sources to an egress network node. In some examples, the egress network node (or a controller for the network) computes maximally redundant trees (MRTs) from the egress network node to a virtual proxy node virtually added to the network topology by the egress network node for redundant multicast sources of redundant multicast streams.

公开(公告)号：US20190013966A1

公开(公告)日：2019-01-10

申请号：US15644274

申请日：2017-07-07

Applicant: Juniper Networks, Inc.

Inventor： Vikram Nagarajan ,  Robert W. Kebler ,  Kapil Arora ,  Naveen Ashik

IPC: H04L12/46 ,  H04L12/761 ,  H04L12/721 ,  H04L12/741

Abstract: In some examples, a customer edge device (CE) is configured to receive configuration data for multi-homed connectivity for a local layer 2 (L2) network with a L2 virtual private network (L2VPN) for a layer 3 (L3) network for switching L2 packet data units (PDUs) among two or more L2 networks connected to the L3 network including the local L2 network, wherein the configuration data for multi-homed connectivity configures the CE with a primary attachment circuit to a primary neighbor provider edge device (PE) for the L2VPN and with a backup attachment circuit to a backup neighbor PE for the L2VPN; and generate and send, in response to snooping a multicast join message indicating a multicast group, a control plane message via the backup attachment circuit to the backup neighbor PE for the L2VPN, wherein the control plane message is destined for the backup neighbor PE for the L2VPN.

公开(公告)号：US10050873B2

公开(公告)日：2018-08-14

申请号：US15157058

申请日：2016-05-17

Applicant: Juniper Networks, Inc.

Inventor： Kapil Arora ,  Nitin Singh ,  Sunil Kumar Malali ,  Vikram Nagarajan

IPC: H04L12/723 ,  H04L12/46 ,  H04L12/751 ,  H04L12/761 ,  H04L12/707 ,  H04L12/703 ,  H04L12/721 ,  H04L12/24 ,  H04L12/18

Abstract: A first device may receive network traffic including a first label. The first label may be an inclusive multicast label associated with a second device. The second device may be a designated forwarder for an Ethernet segment. The first device may determine a second label based on receiving the network traffic including the first label. The second label may be used to route the network traffic to a customer edge device, via a third device, rather than the second device. The third device may be a non-designated forwarder for the Ethernet segment. The first device may provide the network traffic, including the second label, to the third device to permit the third device to provide, via the Ethernet segment, the network traffic to the customer edge device based on the second label when a failure occurs in association with the second device.

公开(公告)号：US10033539B1

公开(公告)日：2018-07-24

申请号：US15087757

申请日：2016-03-31

Applicant: Juniper Networks, Inc.

Inventor： Vikram Nagarajan ,  Sachin S. Natu ,  Kapil Arora ,  Sunil Kumar Malali ,  Goutham Patil R ,  Raj Chetan Boddireddy

IPC: H04L12/18 ,  H04L12/46 ,  H04L29/12 ,  H04L12/24

Abstract: In one example, a first routing device of an Ethernet virtual private network (EVPN) is multihomed to a customer edge (CE) routing device with a second routing device. The first routing device includes one or more network interfaces configured to send and receive packets. The first routing device also includes one or more processors configured to receive, via the one or more network interfaces, a first packet from the CE routing device including multicast join information, update multicast state information of the first routing device using the multicast join information from the first packet, and send, via the one or more network interfaces, a second packet including data representative of the multicast join information to the second routing device to synchronize multicast state information of the second routing device with the multicast state information of the first routing device.

公开(公告)号：US09998361B2

公开(公告)日：2018-06-12

申请号：US14980945

申请日：2015-12-28

Applicant: Juniper Networks, Inc.

Inventor： Robert W. Kebler ,  Vikram Nagarajan ,  Bharath RadhaKrishna Bhat ,  Anish Peter

IPC: G01R31/08 ,  H04L12/703 ,  H04L12/927 ,  H04L12/723 ,  H04L12/705 ,  H04L29/08

CPC classification number: H04L45/28 ,  H04L45/18 ,  H04L45/507 ,  H04L47/806 ,  H04L67/1046 ,  H04L67/22 ,  H04L67/2814 ,  H04L69/40

Abstract: Techniques are described for enhancements to multicast Label Distribution Protocol (mLDP) to support multicast only fast re-route (MoFRR) over a remote loop free alternate (RLFA) backup path. An egress router is configured to generate a modified mLDP control message to signal the RLFA backup path in which an address of a RLFA node is included in an LSPRoot field and an address of an ingress router is included in an opaque data field. In addition, the RLFA node of the RLFA backup path is configured to recognize that it is identified in the LSPRoot field of the modified mLDP control message, and, in response, look up the ingress router identified in the opaque data field of the modified mLDP control message. The RLFA node is further configured to send an mLDP control message that includes the address of the ingress router in the LSPRoot field towards the ingress router.

公开(公告)号：US09843513B2

公开(公告)日：2017-12-12

申请号：US14728021

申请日：2015-06-02

Applicant: Juniper Networks, Inc.

Inventor： Vikram Nagarajan ,  Anish Peter ,  Robert W. Kebler

IPC: H04L12/28 ,  H04L12/741 ,  H04L12/18 ,  H04L12/751

CPC classification number: H04L45/74 ,  H04L12/18 ,  H04L45/026 ,  H04L45/16 ,  H04L45/42

Abstract: An example method includes exchanging targeted hello messages to establish a targeted neighbor connection between a first routing device and a second routing device, wherein one of the routing devices comprises a central routing device, and wherein another one of the routing devices comprises an ingress routing device. The example method further includes processing a source-active register message that specifies a source address and an identifier that are collectively associated with a multicast stream, and wherein the source-active register message further indicates whether the multicast stream is active or withdrawn. After processing the source-active register message, the example method further includes processing a list-of-receivers register message that specifies an egress routing device and at least the identifier that is associated with the multicast stream, wherein the list-of-receivers register message further indicates whether or not the egress routing device requests receipt of data associated with the multicast stream.

公开(公告)号：US20170289217A1

公开(公告)日：2017-10-05

申请号：US15086897

申请日：2016-03-31

Applicant: Juniper Networks, Inc.

Inventor： Robert W. Kebler ,  Vikram Nagarajan ,  Sunil Kumar ,  Sanoj Kadavil Vivekanandan

IPC: H04L29/06 ,  H04L12/911 ,  H04L12/751

CPC classification number: H04L65/4076 ,  H04L12/1886 ,  H04L45/02 ,  H04L45/16 ,  H04L47/825

Abstract: In some examples, a method includes receiving, by a first ingress network device for a network, a source tree join route message from an egress network device for the network, specifying a multicast source and a multicast group, and in response to receiving the source tree join route message, determining, by the ingress network device, whether the multicast source is multi-homed to the network via the first ingress network device and a second ingress network device for the network. The method includes, in response to determining that the multicast source is not multi-homed, forwarding traffic for the multicast source on an inclusive provider tunnel without initiating setup of a selective provider tunnel to the egress network device, and in response to determining that the multicast source is multi-homed, initiating setup of a selective provider tunnel to the egress network device and terminating forwarding multicast traffic on the inclusive provider tunnel.