公开(公告)号：US09900170B2

公开(公告)日：2018-02-20

申请号：US15060365

申请日：2016-03-03

Applicant: Juniper Networks, Inc

Inventor： Maruthi Kishore Tiruveedhula ,  Tapraj Singh ,  Sunesh Rustagi ,  Arijit Paul ,  Vikas Vidyalal Patel ,  Himanshu Agarwal ,  Suneel Kumar Pentala

IPC: H04L12/18 ,  H04L12/751 ,  H04L12/741 ,  H04L12/721 ,  H04L29/12

CPC classification number: H04L12/1886 ,  H04L45/02 ,  H04L45/08 ,  H04L45/66 ,  H04L45/745 ,  H04L61/2069 ,  H04L61/6022

Abstract: In one example, a method includes performing L2 learning of a C-MAC address included in a first L2 data message by a first provider edge (PE) router included in an Ethernet Segment of a Provider-Backbone Bridging Ethernet Virtual Private Network (PBB-EVPN); sending to a second PE router within the Ethernet Segment an L2 control message comprising the C-MAC address and a B-MAC address corresponding to the Ethernet Segment of the PBB-EVPN, wherein the L2 control message informs the second PE router of the reachability of the C-MAC address through the first PE router; receiving, by the first PE router and from the second PE router, a second L2 data message as unicast traffic destined for the C-MAC address; and forwarding the second L2 data message to the first CE router.

公开(公告)号：US20180034667A1

公开(公告)日：2018-02-01

申请号：US15676181

申请日：2017-08-14

Applicant: Juniper Networks, Inc.

Inventor： Manoj Sharma ,  Shrinivasa Kini ,  Siddharth A. Tuli ,  Tapraj Singh ,  Sunesh Rustagi

IPC: H04L12/46

CPC classification number: H04L12/4675

Abstract: A provider edge (PE) device may receive an indication to perform a designated forwarder (DF) election associated with a network segment that includes the PE device, one or more other PE devices, and a client edge (CE) device. The PE device, the one or more other PE devices, and the CE device may be associated with an Ethernet virtual private network (EVPN) that includes a group of EVPN instances (EVIs). The PE device may perform the DF election in order to determine election information associated with the PE device. The election information may include information associated with a particular EVI, of the group of EVIs, for which the PE device is to act as a DF. The PE device may provide the election information to the CE device to cause the CE device to provide traffic, associated with a particular VLAN included in the particular EVI, to the PE device.

公开(公告)号：US20170250904A1

公开(公告)日：2017-08-31

申请号：US15055061

申请日：2016-02-26

Applicant: Juniper Networks, Inc.

Inventor： Babu Singarayan ,  Tapraj Singh ,  Vikas Vidyalal Patel ,  Swamy Sadashivaiah Renu Kananda

IPC: H04L12/721 ,  H04L12/707 ,  H04L12/46

CPC classification number: H04L45/66 ,  H04L12/4641 ,  H04L45/22

Abstract: Techniques are described to provide split-horizon packet forwarding so as to ensure that packets from the customer network that are injected into the provider backbone bridging Ethernet Virtual Private Network (PBB-EVPN) by one of the provider edge (PE) devices of the multi-homed Ethernet segment are not forwarded back toward the customer network by a different PE device connected to the same multi-homed Ethernet segment. For example, a method may comprise receiving a packet via a core-facing interface of a first PE device, determining the Ethernet segment associated with the PE devices by a lookup operation based on keys of the packet; in response to determining the Ethernet segment, supplanting the core-facing interface of the first PE device with a virtual interface associated with the keys, and forwarding the packet to a second CE device without forwarding the received packet back to the Ethernet segment associated with the first PE device.

公开(公告)号：US10148566B2

公开(公告)日：2018-12-04

申请号：US15055061

申请日：2016-02-26

Applicant: Juniper Networks, Inc.

Inventor： Babu Singarayan ,  Tapraj Singh ,  Vikas Vidyalal Patel ,  Swamy Sadashivaiah Renu Kananda

IPC: H04L12/721 ,  H04L12/46 ,  H04L12/707

Abstract: Techniques are described to provide split-horizon packet forwarding so as to ensure that packets from the customer network that are injected into the provider backbone bridging Ethernet Virtual Private Network (PBB-EVPN) by one of the provider edge (PE) devices of the multi-homed Ethernet segment are not forwarded back toward the customer network by a different PE device connected to the same multi-homed Ethernet segment. For example, a method may comprise receiving a packet via a core-facing interface of a first PE device, determining the Ethernet segment associated with the PE devices by a lookup operation based on keys of the packet; in response to determining the Ethernet segment, supplanting the core-facing interface of the first PE device with a virtual interface associated with the keys, and forwarding the packet to a second CE device without forwarding the received packet back to the Ethernet segment associated with the first PE device.

公开(公告)号：US20180227135A1

公开(公告)日：2018-08-09

申请号：US15945671

申请日：2018-04-04

Applicant: Juniper Networks, Inc.

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

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

CPC classification number: H04L12/18 ,  H04L12/1886 ,  H04L12/4641 ,  H04L12/4654 ,  H04L45/16

Abstract: Techniques are described for utilizing Protocol Independent Multicast Sparse Mode (PIM-SM) to transport BUM (broadcast, unknown unicast, and multicast) traffic in a Virtual Extensible LAN (VXLAN) underlay of a data center, where the BUM traffic is received on active-active, multi-homed Ethernet virtual private network (EVPN) interconnects between multiple physical data centers. For example, the techniques may readily be applied to support usage of PIM-SM where provider edge (PE) routers of the EVPN operate as gateways between the EVPN and the VXLAN spanning the data center interconnect.

公开(公告)号：US09967174B2

公开(公告)日：2018-05-08

申请号：US15010538

申请日：2016-01-29

Applicant: Juniper Networks, Inc.

Inventor： Tapraj Singh ,  Selvakumar Sivaraj ,  Sunesh Rustagi ,  John E. Drake

IPC: H04L12/28 ,  H04L12/761 ,  H04L12/18 ,  H04L12/703 ,  H04L12/715

CPC classification number: H04L45/16 ,  H04L12/18 ,  H04L12/1854 ,  H04L12/189 ,  H04L45/04 ,  H04L45/28

Abstract: A device may transmit, to one or more network devices of a portion of a network, information indicating that the device is configured to perform a static designated forwarder election procedure. The device may determine that the one or more network devices of the portion of the network are each configured to perform the static designated forwarder election procedure. The device may enable a static designated forwarder configuration of the device based on determining that the one or more network devices of the portion of the network are each configured to perform the static designated forwarder election procedure.

公开(公告)号：US09735983B1

公开(公告)日：2017-08-15

申请号：US14500120

申请日：2014-09-29

Applicant: Juniper Networks, Inc.

Inventor： Manoj Sharma ,  Shrinivasa Kini ,  Siddharth A. Tuli ,  Tapraj Singh ,  Sunesh Rustagi

IPC: H04L12/28 ,  H04L12/46

CPC classification number: H04L12/4675

Abstract: A provider edge (PE) device may receive an indication to perform a designated forwarder (DF) election associated with a network segment that includes the PE device, one or more other PE devices, and a client edge (CE) device. The PE device, the one or more other PE devices, and the CE device may be associated with an Ethernet virtual private network (EVPN) that includes a group of EVPN instances (EVIs). The PE device may perform the DF election in order to determine election information associated with the PE device. The election information may include information associated with a particular EVI, of the group of EVIs, for which the PE device is to act as a DF. The PE device may provide the election information to the CE device to cause the CE device to provide traffic, associated with a particular VLAN included in the particular EVI, to the PE device.

公开(公告)号：US20160119156A1

公开(公告)日：2016-04-28

申请号：US14580185

申请日：2014-12-22

Applicant: Juniper Networks, Inc .

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

IPC: H04L12/18 ,  H04L12/761

CPC classification number: H04L12/18 ,  H04L12/1886 ,  H04L12/4641 ,  H04L12/4654 ,  H04L45/16

Abstract: Techniques are described for utilizing Protocol Independent Multicast Sparse Mode (PIM-SM) to transport BUM (broadcast, unknown unicast, and multicast) traffic in a Virtual Extensible LAN (VXLAN) underlay of a data center, where the BUM traffic is received on active-active, multi-homed Ethernet virtual private network (EVPN) interconnects between multiple physical data centers. For example, the techniques may readily be applied to support usage of PIM-SM where provider edge (PE) routers of the EVPN operate as gateways between the EVPN and the VXLAN spanning the data center interconnect.

Abstract translation: 描述了利用协议无关组播稀疏模式（PIM-SM）来在数据中心的虚拟可扩展LAN（VXLAN）底层传输BUM（广播，未知单播和多播）业务的技术，其中BUM业务被接收在活动的 多个物理数据中心之间的主动，多归位以太网虚拟专用网（EVPN）互连。 例如，这些技术可以容易地应用于支持EVPN的提供商边缘（PE）路由器作为跨越数据中心互连的EVPN和VXLAN之间的网关的PIM-SM的使用。

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：US10469361B1

公开(公告)日：2019-11-05

申请号：US15270527

申请日：2016-09-20

Applicant: Juniper Networks, Inc.

Inventor： Candida M. Bayross ,  SelvaKumar Sivaraj ,  Tapraj Singh ,  Sunesh Rustagi

IPC: H04L12/705 ,  H04L12/46 ,  H04L12/721 ,  H04L12/741

Abstract: In general, techniques are described for reducing forwarding loops for layer (L2) traffic that traverses an EVPN or PBB-EVPN instance (EVI) by deterministically determining an access-facing logical interface to block from respective access-facing logical interfaces of PE devices that switch the L2 traffic using the EVI. A provider edge (PE) network device may detect an L2 forwarding loop on an L2 forwarding path that includes the access-facing logical interface. In response to detecting an L2 forwarding loop and based at least on comparing an identifier for the local PE device and an identifier for a remote PE device that implements the EVPN instance, the PE device may block the access-facing logical interface to block L2 traffic from the local customer network.