公开(公告)号：US11799716B2

公开(公告)日：2023-10-24

申请号：US17657382

申请日：2022-03-31

Applicant: Juniper Networks, Inc.

Inventor： Channasangamesh S Hugar ,  Babu Singarayan ,  Sharmila Koppula ,  Soumyodeep Joarder ,  Sudhin Jacob

IPC: H04L41/0654 ,  H04L12/46 ,  H04L45/02 ,  H04L69/324

CPC classification number: H04L41/0654 ,  H04L12/4633 ,  H04L12/4641 ,  H04L45/026 ,  H04L69/324

Abstract: Techniques are described to provide layer 2 (L2) circuit failover in the event connectivity to an Ethernet Virtual Private Network (EVPN) instance is lost. For example, if one of multi-homed provider edge (PE) devices loses connectivity to the EVPN instance, the PE device may mark its customer-facing interface as down and propagate the interface status to the access node such that the access node may update its routing information to switch L2 circuits to another one of the multi-homed PE devices having reachability to the EVPN instance. In some examples, the plurality of PE devices may further implement Connectivity Fault Management (CFM) techniques to propagate the interface status to the access node such that the access node may update its forwarding information to send traffic on a different L2 circuit to another one of the multi-homed PE devices having reachability to the EVPN instance.

公开(公告)号：US20220224593A1

公开(公告)日：2022-07-14

申请号：US17657382

申请日：2022-03-31

Applicant: Juniper Networks, Inc.

Inventor： Channasangamesh S. Hugar ,  Babu Singarayan ,  Sharmila Koppula ,  Soumyodeep Joarder ,  Sudhin Jacob

IPC: H04L41/0654 ,  H04L12/46 ,  H04L45/02

Abstract: Techniques are described to provide layer 2 (L2) circuit failover in the event connectivity to an Ethernet Virtual Private Network (EVPN) instance is lost. For example, if one of multi-homed provider edge (PE) devices loses connectivity to the EVPN instance, the PE device may mark its customer-facing interface as down and propagate the interface status to the access node such that the access node may update its routing information to switch L2 circuits to another one of the multi-homed PE devices having reachability to the EVPN instance. In some examples, the plurality of PE devices may further implement Connectivity Fault Management (CFM) techniques to propagate the interface status to the access node such that the access node may update its forwarding information to send traffic on a different L2 circuit to another one of the multi-homed PE devices having reachability to the EVPN instance.

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：US10680966B2

公开(公告)日：2020-06-09

申请号：US15855276

申请日：2017-12-27

Applicant: Juniper Networks, Inc.

Inventor： Sayantani Gupta ,  Babu Singarayan ,  Sharmila Koppula ,  Gaurav Ganeriwal ,  Arun G Menon ,  Vishnu Janardhanan S

IPC: H04L12/863 ,  H04L12/741 ,  H04L12/801 ,  H04L12/823 ,  H04L12/803 ,  H04L12/947 ,  H04L12/26 ,  H04L12/931 ,  H04L12/28

Abstract: The techniques describe packet reordering for packets flowing on a new path in response to a change in internal forwarding paths in a network device. For example, a network device may dynamically change the selection of an internal forwarding path to achieve fabric path optimization (“OFP”) or to ensure optimized load balancing. Packets forwarded on the new path are buffered such that the transmission of packets forwarded on the new path are delayed for a buffering time period of at least the time in which a packet is being sent from the source packet processor to the initial destination packet processor.

公开(公告)号：US10742542B2

公开(公告)日：2020-08-11

申请号：US16166731

申请日：2018-10-22

Applicant: Juniper Networks, Inc.

Inventor： Wen Lin ,  Sharmila Koppula ,  Soumyodeep Joarder

IPC: H04L12/46 ,  H04L12/709 ,  H04L12/721 ,  H04L12/801

Abstract: A device may determine a link aggregation group (LAG) that aggregates links that includes a first group of links that connects the device to a first provider edge (PE) device and a second group of links that connects the device to the second PE device, where the first PE device and the second PE device are on an Ethernet virtual private network (EVPN) and are multi-homed PE devices for the device, and where the first PE device provides a local connection to a customer edge (CE) device for the device. The device may receive a message from the first PE device indicating that the first PE device lacks a connection with the EVPN, and may send, based on the message, traffic intended for the CE device via the first PE device and traffic intended for the EVPN via the second PE device and not the first PE device.

公开(公告)号：US10693679B2

公开(公告)日：2020-06-23

申请号：US16127101

申请日：2018-09-10

Applicant: Juniper Networks, Inc.

Inventor： Wen Lin ,  Pankaj Kumar Gupta ,  Babu Singarayan ,  Sharmila Koppula ,  Manish Gupta ,  Kapil Arora

IPC: G06F15/16 ,  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：US20200127917A1

公开(公告)日：2020-04-23

申请号：US16166731

申请日：2018-10-22

Applicant: Juniper Networks, Inc.

Inventor： Wen Lin ,  Sharmila Koppula ,  Soumyodeep Joarder

IPC: H04L12/709 ,  H04L12/721 ,  H04L12/46

Abstract: A device may determine a link aggregation group (LAG) that aggregates links that includes a first group of links that connects the device to a first provider edge (PE) device and a second group of links that connects the device to the second PE device, where the first PE device and the second PE device are on an Ethernet virtual private network (EVPN) and are multi-homed PE devices for the device, and where the first PE device provides a local connection to a customer edge (CE) device for the device. The device may receive a message from the first PE device indicating that the first PE device lacks a connection with the EVPN, and may send, based on the message, traffic intended for the CE device via the first PE device and traffic intended for the EVPN via the second PE device and not the first PE device.

公开(公告)号：US11296908B2

公开(公告)日：2022-04-05

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: G06F15/16 ,  H04L12/46 ,  H04L45/28 ,  H04L45/24 ,  H04L45/50 ,  H04L43/0817 ,  H04L45/00

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：US11283672B2

公开(公告)日：2022-03-22

申请号：US15989961

申请日：2018-05-25

Applicant: Juniper Networks, Inc.

Inventor： Gaurav Ganeriwal ,  Sharmila Koppula ,  Babu Singarayan ,  Vishnu Janardhanan S ,  Sayantani Gupta

IPC: H04L12/24 ,  H04L12/26 ,  H04L41/0654 ,  H04L43/0811 ,  H04L43/10

Abstract: The techniques describe detecting connectivity failure of an aggregated interface. To monitor connectivity of the aggregated interface, a packet processor of a plurality of packet processors is set as a session master responsible for managing an active forwarding plane connectivity detection session with a peer session master node. The other local packet processors of the virtual network node are selected as session standby nodes that each have a passive forwarding plane connectivity detection session running to the peer session master node. If a session master node goes down (i.e., by link or node failure), one of the local session standby nodes may detect the failure and is set as a new session master node by activating its passive session having the same session parameters.

公开(公告)号：US20200213182A1

公开(公告)日：2020-07-02

申请号：US16235230

申请日：2018-12-28

Applicant: Juniper Networks, Inc.

Inventor： Channasangamesh S. Hugar ,  Babu Singarayan ,  Sharmila Koppula ,  Soumyodeep Joarder ,  Sudhin Jacob

IPC: H04L12/24 ,  H04L12/46 ,  H04L12/751

Abstract: Techniques are described to provide layer 2 (L2) circuit failover in the event connectivity to an Ethernet Virtual Private Network (EVPN) instance is lost. For example, if one of multi-homed provider edge (PE) devices loses connectivity to the EVPN instance, the PE device may mark its customer-facing interface as down and propagate the interface status to the access node such that the access node may update its routing information to switch L2 circuits to another one of the multi-homed PE devices having reachability to the EVPN instance. In some examples, the plurality of PE devices may further implement Connectivity Fault Management (CFM) techniques to propagate the interface status to the access node such that the access node may update its forwarding information to send traffic on a different L2 circuit to another one of the multi-homed PE devices having reachability to the EVPN instance.