公开(公告)号：US10587517B2

公开(公告)日：2020-03-10

申请号：US15827476

申请日：2017-11-30

Applicant: Juniper Networks, Inc.

Inventor： Vishnu Janardhanan S ,  Babu Singarayan ,  Sayantani Gupta ,  Arun G Menon ,  Binu Shanmughan

IPC: H04L12/743 ,  H04L29/06 ,  H04L12/46 ,  H04L12/947

Abstract: The techniques describe directly forwarding a packet from an ingress packet forwarding engine to a particular destination packet forwarding engine (PFE) when internal packet load balancing may otherwise result in an increased number of fabric hops. For example, a source PFE may receive incoming packets destined for a router reachable only by a particular destination PFE (e.g., egress PFE). Rather than load balancing the incoming packets to a destination PFE that is likely to be a non-egress PFE, a source PFE obtains fabric path information associated with the egress PFE from a destination PFE such that source PFE may forward incoming packets directly to the egress PFE.

公开(公告)号：US20190199647A1

公开(公告)日：2019-06-27

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

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：US10785157B2

公开(公告)日：2020-09-22

申请号：US15919662

申请日：2018-03-13

Applicant: Juniper Networks, Inc.

Inventor： Sayantani Gupta ,  Babu Singarayan ,  Vijeyalakshumi Koteeswaran ,  Renuka Sri Harsha C H ,  Arun G Menon ,  Vishnu Janardhanan S ,  Sukesh Kumar

IPC: H04L12/26 ,  H04L12/803 ,  H04L12/24 ,  H04L12/721 ,  H04L12/743 ,  H04L12/947 ,  H04L12/931 ,  H04L12/825 ,  H04L12/713

Abstract: The techniques describe adaptive load-balancing based on traffic feedback from packet processors. In one example, a source virtual network node of the network device may determine whether a particular destination packet processor is or may become oversubscribed. For example, source packet processors of the source virtual network node may exchange feedback messages including traffic flow rate information. The source virtual network node may compute a total traffic flow rate and compare the total traffic flow rate with a bandwidth of the particular destination packet processor. In response to determining that the bandwidth of the destination packet processor is oversubscribed, the source virtual network node may update a forwarding plane data structure to reduce a likelihood of selecting the destination packet processor to which to forward packet flows.

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：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：US20190288946A1

公开(公告)日：2019-09-19

申请号：US15919662

申请日：2018-03-13

Applicant: Juniper Networks, Inc.

Inventor： Sayantani Gupta ,  Babu Singarayan ,  Vijeyalakshumi Koteeswaran ,  Renuka Sri Harsha C H ,  Arun G. Menon ,  Vishnu Janardhanan S ,  Sukesh Kumar

IPC: H04L12/803 ,  H04L12/721 ,  H04L12/743 ,  H04L12/947 ,  H04L12/24

Abstract: The techniques describe adaptive load-balancing based on traffic feedback from packet processors. In one example, a source virtual network node of the network device may determine whether a particular destination packet processor is or may become oversubscribed. For example, source packet processors of the source virtual network node may exchange feedback messages including traffic flow rate information. The source virtual network node may compute a total traffic flow rate and compare the total traffic flow rate with a bandwidth of the particular destination packet processor. In response to determining that the bandwidth of the destination packet processor is oversubscribed, the source virtual network node may update a forwarding plane data structure to reduce a likelihood of selecting the destination packet processor to which to forward packet flows.

公开(公告)号：US20190166050A1

公开(公告)日：2019-05-30

申请号：US15827476

申请日：2017-11-30

Applicant: Juniper Networks, Inc.

Inventor： Vishnu Janardhanan S ,  Babu Singarayan ,  Sayantani Gupta ,  Arun G Menon ,  Binu Shanmughan

IPC: H04L12/743 ,  H04L12/46 ,  H04L29/06

Abstract: The techniques describe directly forwarding a packet from an ingress packet forwarding engine to a particular destination packet forwarding engine (PFE) when internal packet load balancing may otherwise result in an increased number of fabric hops. For example, a source PFE may receive incoming packets destined for a router reachable only by a particular destination PFE (e.g., egress PFE). Rather than load balancing the incoming packets to a destination PFE that is likely to be a non-egress PFE, a source PFE obtains fabric path information associated with the egress PFE from a destination PFE such that source PFE may forward incoming packets directly to the egress PFE.

公开(公告)号：US10142129B1

公开(公告)日：2018-11-27

申请号：US15277574

申请日：2016-09-27

Applicant: Juniper Networks, Inc.

Inventor： Sayantani Gupta ,  Babu Singarayan

IPC: H04L12/28 ,  H04L12/46 ,  H04L12/947 ,  H04L12/721

Abstract: In general, techniques are described for filtering duplicate broadcast, unknown unicast, and multicast (BUM) packets in a network in which EVPN traffic is tunneled, using a tunneling protocol such as VXLAN or NVGRE, over an IP core network to provide network virtualization overlay (NVO) between provider edge (PE) devices that operate as Network Virtualization Endpoints (NVEs) for the NVO/Virtual Tunnel Endpoints (VTEPs) for the tunneling protocol.