公开(公告)号：US09590902B2

公开(公告)日：2017-03-07

申请号：US14585841

申请日：2014-12-30

Applicant: Juniper Networks, Inc.

Inventor： Wen Lin ,  Vasudevan Venkatraman ,  John E. Drake

IPC: H04L29/12 ,  H04L12/46 ,  H04L12/721 ,  H04L12/715 ,  H04L12/723 ,  G06F11/00

CPC classification number: H04L45/66 ,  H04L12/4641 ,  H04L45/04 ,  H04L45/50 ,  H04L45/74

Abstract: Techniques are described for signaling aliasing capability between routers in a multi-tenant data center that uses VPNs, such as Ethernet VPNs. In the multi-tenant data center, two or more PE routers may be connected to a CE router by a multi-homed L2 segment in an all-active mode. Aliasing refers to the ability of a PE router to signal that it can reach a given multi-homed L2 segment even when the PE router has learned no MAC addresses over that multi-homed L2 segment. The PE routers on the multi-homed L2 segment advertise aliasing capability using a route advertisement on a per-L2 segment basis. When the multi-tenant data center uses global VPN identifiers, no additional information is needed by a remote PE to build an ECMP next hop to the PE routers that support aliasing, and transmission of a route advertisement on a per-VPN basis may be suppressed.

Abstract translation: 描述了用于在使用VPN的多租户数据中心（例如以太网VPN）中的路由器之间的信号混叠能力的技术。 在多租户数据中心中，两个或多个PE路由器可以以全主动模式通过多宿主L2段连接到CE路由器。 混淆是指PE路由器发信号通知其能够达到给定的多宿主L2段的能力，即使PE路由器在该多宿主L2段上没有学到MAC地址。 多宿主L2段上的PE路由器通过基于每个L2段的路由通告来通告混叠能力。 当多租户数据中心使用全球VPN标识符时，远程PE不需要额外的信息来构建支持混叠的PE路由器的ECMP下一跳，并且可以抑制基于每个VPN的路由通告的传输 。

公开(公告)号：US11057295B1

公开(公告)日：2021-07-06

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 ,  H04L12/723 ,  H04L12/717 ,  H04L12/46 ,  H04L29/06

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 unicast traffic, via a backup tunnel, to an egress PE which protects the protector egress PE.

公开(公告)号：US10476792B2

公开(公告)日：2019-11-12

申请号：US15932198

申请日：2018-02-16

Applicant: Juniper Networks, Inc.

Inventor： Selvakumar Sivaraj ,  Wen Lin ,  Ravi Shekhar ,  Vasudevan Venkatraman

IPC: H04L12/721 ,  H04L29/12 ,  H04W48/16

Abstract: A device may receive, via a first message, first route information for directing network traffic for a network. The first route information may identify a media access control (MAC) route corresponding to a MAC address associated with a host device connecting to a subnet of the network. The first route information may fail to include Internet protocol (IP)/MAC binding information associated with the host device. The device may transmit a request for IP/MAC binding information associated with the host device. The device may receive a response, to the request for IP/MAC binding information, identifying the IP/MAC binding information. The device may advertise, via a second message, second route information for directing network traffic for the network based on receiving the response identifying the IP/MAC binding information. The second route information may identify the IP/MAC binding information associated with the host device.

公开(公告)号：US11252074B2

公开(公告)日：2022-02-15

申请号：US16829595

申请日：2020-03-25

Applicant: Juniper Networks, Inc.

Inventor： Vasudevan Venkatraman ,  Sushant Kumar

IPC: H04L12/715 ,  H04L12/46 ,  H04L12/26 ,  H04L12/709 ,  H04L29/08

Abstract: A network device may receive, from an endpoint device, a first message that includes first endpoint identification information. The network device may be connected to the endpoint device via a plurality of links. The network device may receive, from another network device, a second message that includes second endpoint identification information. The network device may determine whether the first endpoint identification information corresponds to the second endpoint identification information. The network device may cause, based on determining whether the first endpoint identification information corresponds to the second endpoint identification information, a state of the plurality of links to be maintained or changed.

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：US09900247B2

公开(公告)日：2018-02-20

申请号：US15012057

申请日：2016-02-01

Applicant: Juniper Networks, Inc.

Inventor： Selvakumar Sivaraj ,  Wen Lin ,  Ravi Shekhar ,  Vasudevan Venkatraman

IPC: H04L12/721 ,  H04L29/12 ,  H04W48/16

CPC classification number: H04L45/66 ,  H04L61/103 ,  H04L61/2007 ,  H04L61/6022 ,  H04W48/16

Abstract: A device may receive, via a first message, first route information for directing network traffic for a network. The first route information may identify a media access control (MAC) route corresponding to a MAC address associated with a host device connecting to a subnet of the network. The first route information may fail to include Internet protocol (IP)/MAC binding information associated with the host device. The device may transmit a request for IP/MAC binding information associated with the host device. The device may receive a response, to the request for IP/MAC binding information, identifying the IP/MAC binding information. The device may advertise, via a second message, second route information for directing network traffic for the network based on receiving the response identifying the IP/MAC binding information. The second route information may identify the IP/MAC binding information associated with the host device.

公开(公告)号：US20170163530A1

公开(公告)日：2017-06-08

申请号：US15436280

申请日：2017-02-17

Applicant: Juniper Networks, Inc.

Inventor： John E. Drake ,  Wen Lin ,  Vasudevan Venkatraman

IPC: H04L12/721 ,  H04L12/723 ,  H04L12/741 ,  H04L12/46

CPC classification number: H04L45/66 ,  H04L12/4641 ,  H04L45/04 ,  H04L45/50 ,  H04L45/74

Abstract: Techniques are described for signaling aliasing capability between routers in a multi-tenant data center that uses VPNs, such as Ethernet VPNs. In the multi-tenant data center, two or more PE routers may be connected to a CE router by a multi-homed L2 segment in an all-active mode. Aliasing refers to the ability of a PE router to signal that it can reach a given multi-homed L2 segment even when the PE router has learned no MAC addresses over that multi-homed L2 segment. The PE routers on the multi-homed L2 segment advertise aliasing capability using a route advertisement on a per-L2 segment basis. When the multi-tenant data center uses global VPN identifiers, no additional information is needed by a remote PE to build an ECMP next hop to the PE routers that support aliasing, and transmission of a route advertisement on a per-VPN basis may be suppressed.

公开(公告)号：US20160134528A1

公开(公告)日：2016-05-12

申请号：US14585841

申请日：2014-12-30

Applicant: Juniper Networks, Inc.

Inventor： Wen Lin ,  Vasudevan Venkatraman ,  John E. Drake

IPC: H04L12/721 ,  H04L12/715 ,  H04L29/12 ,  H04L12/46

CPC classification number: H04L45/66 ,  H04L12/4641 ,  H04L45/04 ,  H04L45/50 ,  H04L45/74

Abstract: Techniques are described for signaling aliasing capability between routers in a multi-tenant data center that uses VPNs, such as Ethernet VPNs. In the multi-tenant data center, two or more PE routers may be connected to a CE router by a multi-homed L2 segment in an all-active mode. Aliasing refers to the ability of a PE router to signal that it can reach a given multi-homed L2 segment even when the PE router has learned no MAC addresses over that multi-homed L2 segment. The PE routers on the multi-homed L2 segment advertise aliasing capability using a route advertisement on a per-L2 segment basis. When the multi-tenant data center uses global VPN identifiers, no additional information is needed by a remote PE to build an ECMP next hop to the PE routers that support aliasing, and transmission of a route advertisement on a per-VPN basis may be suppressed.

Abstract translation: 描述了用于在使用VPN的多租户数据中心（例如以太网VPN）中的路由器之间的信号混叠能力的技术。 在多租户数据中心中，两个或多个PE路由器可以以全主动模式通过多宿主L2段连接到CE路由器。 混淆是指PE路由器发信号通知其能够达到给定的多宿主L2段的能力，即使PE路由器在该多宿主L2段上没有学到MAC地址。 多宿主L2段上的PE路由器通过基于每个L2段的路由通告来通告混叠能力。 当多租户数据中心使用全球VPN标识符时，远程PE不需要额外的信息来构建支持混叠的PE路由器的ECMP下一跳，并且可以抑制基于每个VPN的路由通告的传输 。