公开(公告)号：US20230344741A1

公开(公告)日：2023-10-26

申请号：US17815099

申请日：2022-07-26

Applicant: Cisco Technology, Inc.

Inventor： Vishali Somaskanthan ,  Saurabh Kumar ,  Satyajit Das ,  Priyanka Chidambar Patil

IPC: H04L1/00 ,  H04L43/12

CPC classification number: H04L1/0045 ,  H04L1/0021 ,  H04L43/12

Abstract: In one embodiment, a method includes configuring a first application probe class and a second application probe class. The first application probe class may be associated with a first Differentiated Services Code Point (DSCP), and the second application probe class may be associated with a second DSCP. The method also includes determining an adaptive Forward Error Correction (FEC) data policy for the first application probe class and the second application probe class, calculating a first loss value associated with the first application probe class for a link between a first network node and a second network node, and comparing the first loss value to a first loss threshold. The method further includes determining whether to activate FEC processing for the first application probe class in response to comparing the first loss value to the first loss threshold.

公开(公告)号：US20210036987A1

公开(公告)日：2021-02-04

申请号：US16530596

申请日：2019-08-02

Applicant: Cisco Technology, Inc.

Inventor： Ajay Kumar Mishra ,  Satyajit Das ,  Laxmikantha Reddy Ponnuru ,  Anubhav Gupta

IPC: H04L29/12 ,  H04L12/24 ,  H04L12/46 ,  H04L12/707

Abstract: A WAN controller can configure a first WAN interface on a first WAN edge device to connect to a first transport network. The WAN controller can configure a second WAN interface on a second WAN edge device to connect to a second transport network. The WAN controller or the first WAN edge device, connected to a first access device of an access network, can determine the first WAN edge device has no Layer 2 connectivity to the second WAN edge device, connected to a second access device of the access network. The WAN controller or the first WAN edge device can establish a tunnel between the first WAN edge device and the second WAN interface. The WAN controller can route a specified class of WAN traffic received by the first WAN edge device from the access network through the tunnel.

公开(公告)号：US20240414094A1

公开(公告)日：2024-12-12

申请号：US18208165

申请日：2023-06-09

Applicant: Cisco Technology, Inc.

Inventor： Avinash Shah ,  Ganesh Devendrachar ,  Arul Murugan Manickam ,  Laxmikantha Reddy Ponnuru ,  Satyajit Das ,  Pritam Baruah

IPC: H04L47/36

Abstract: Techniques are described for detecting a change in Path Maximum Transfer Unit (PMTU) in a network and initiating a PMTU discovery process. A Bidirectional Forwarding Detection (BFD) data packet is generated having enhanced headers configured to record a largest packet sent value and a largest packet received value. The BFD data packet is sent from a first network device (such as a first router) to a second network device (such as a second router). A largest packet sent value and a largest packet received value are each recorded in the BFD data packet. If the largest data packet sent value is larger than the largest data packet received value, then a determination can be made that a path change has resulted in a reduction in PMTU which has resulted in either a data packet being fragmented, a data packet being dropped or both. A PMTU discovery can then be performed.

公开(公告)号：US12068959B1

公开(公告)日：2024-08-20

申请号：US18225487

申请日：2023-07-24

Applicant: Cisco Technology, Inc.

Inventor： Ganesh Devendrachar ,  Ajeet Pal Singh Gill ,  Balaji Sundararajan ,  Srilatha Tangirala ,  Satish Varadarajula ,  Satyajit Das

IPC: H04L45/76 ,  H04L45/24 ,  H04L47/125

CPC classification number: H04L45/76 ,  H04L45/24 ,  H04L47/125

Abstract: Techniques for automatically providing per tenant weighted DCMP over shared transport interfaces and automated flow has load balancing are described. The techniques may include onboarding the tenant to the local multi-tenant edge device associated with a tenant, where the resource profile defines a traffic allowance per transport interface for the tenant. Local weight per transport interface is applied. Information including local weight per transport interface is transmitted to a remote device via an SD-WAN controller. Information including a remote weight per transport interface of the remote device is received via the SD-WAN controller. Traffic is routed from the tenant based on local weight per transport interface of the local device and remote weight per transport interface of the remote device.

公开(公告)号：US20230344771A1

公开(公告)日：2023-10-26

申请号：US17816818

申请日：2022-08-02

Applicant: Cisco Technology, Inc.

Inventor： Arul Murugan Manickam ,  Avinash Shah ,  Laxmikantha Reddy Ponnuru ,  Satyajit Das ,  Deepa Rajendra Sangolli ,  Govindakrishnan Kannan ,  Pritam Baruah

IPC: H04L47/125 ,  H04L47/2416

CPC classification number: H04L47/125 ,  H04L47/2416

Abstract: In one embodiment, a method includes receiving traffic and identifying one or more attributes associated with the traffic. The method also includes dynamically selecting a load balancing algorithm based on the one or more attributes in accordance with a load balancing scheme. The method further includes performing load balancing on the traffic in accordance with the load balancing algorithm and communicating the traffic from a first network element to a second network element in accordance with the load balancing.

公开(公告)号：US20240348554A1

公开(公告)日：2024-10-17

申请号：US18133975

申请日：2023-04-12

Applicant: Cisco Technology, Inc.

Inventor： Balaji Sundararajan ,  Ganesh Devendrachar ,  Avinash Shah ,  Preety Mordani ,  Satyajit Das ,  Michael John Moskal

IPC: H04L47/43 ,  H04L47/36

CPC classification number: H04L47/43 ,  H04L47/36

Abstract: Techniques are described for avoiding data packet fragmentation in a routing device such as a router or network switch. Path Maximum Transport Unit (PMTU) values are monitored for a plurality of egress links of a networking device. A statistical analysis of fragmentation rates is performed. The statistical analysis can be performed on a per-link basis, per-flow basis or both per-link and per-flow basis. If the packet fragmentation rate of data flows through a particular egress link exceeds a determined threshold value, one or more data flows can be re-routed to a different egress link having a higher PMTU, thereby preventing data packet fragmentation.

公开(公告)号：US20240179082A1

公开(公告)日：2024-05-30

申请号：US18433756

申请日：2024-02-06

Applicant: Cisco Technology, Inc.

Inventor： Vishali Somaskanthan ,  Saurabh Kumar ,  Satyajit Das ,  Priyanka Chidambar Patil

IPC: H04L43/12 ,  H04L1/00

CPC classification number: H04L43/12 ,  H04L1/0021 ,  H04L1/0045

Abstract: In one embodiment, a method includes configuring a first application probe class and a second application probe class. The first application probe class may be associated with a first Differentiated Services Code Point (DSCP), and the second application probe class may be associated with a second DSCP. The method also includes determining an adaptive Forward Error Correction (FEC) data policy for the first application probe class and the second application probe class, calculating a first loss value associated with the first application probe class for a link between a first network node and a second network node, and comparing the first loss value to a first loss threshold. The method further includes determining whether to activate FEC processing for the first application probe class in response to comparing the first loss value to the first loss threshold.

公开(公告)号：US20220029857A1

公开(公告)日：2022-01-27

申请号：US17091240

申请日：2020-11-06

Applicant: Cisco Technology, Inc.

Inventor： Laxmikantha Reddy Ponnuru ,  Samir Thoria ,  Managa Sunitha Arun Kumar ,  Satyajit Das ,  Ram Dular Singh

IPC: H04L12/46 ,  H04L12/707

Abstract: The present disclosure is directed to a mechanism for optimized application performance in SD-WAN, and includes the steps of receiving initial traffic packets at a first site for transmission to a second site; determining whether a direct tunnel is established between the first site and the second site based on a state of the second site, the state comprising an active state indicating that a direct tunnel is established between the first and second sites or an inactive state indicating that the direct tunnel is not established between the first and second sites; and in response to determining that the direct tunnel is not established, determining that the initial packets satisfy a configured trigger; forwarding the initial packets to the second site via a backup path; establishing the direct tunnel between the first and second sites; and forwarding subsequent traffic packets to the second site via the established direct tunnel.

公开(公告)号：US11902140B2

公开(公告)日：2024-02-13

申请号：US17815099

申请日：2022-07-26

Applicant: Cisco Technology, Inc.

Inventor： Vishali Somaskanthan ,  Saurabh Kumar ,  Satyajit Das ,  Priyanka Chidambar Patil

IPC: H04L43/12 ,  H04L1/00

CPC classification number: H04L43/12 ,  H04L1/0021 ,  H04L1/0045

Abstract: In one embodiment, a method includes configuring a first application probe class and a second application probe class. The first application probe class may be associated with a first Differentiated Services Code Point (DSCP), and the second application probe class may be associated with a second DSCP. The method also includes determining an adaptive Forward Error Correction (FEC) data policy for the first application probe class and the second application probe class, calculating a first loss value associated with the first application probe class for a link between a first network node and a second network node, and comparing the first loss value to a first loss threshold. The method further includes determining whether to activate FEC processing for the first application probe class in response to comparing the first loss value to the first loss threshold.

公开(公告)号：US20230188460A1

公开(公告)日：2023-06-15

申请号：US17687821

申请日：2022-03-07

Applicant: Cisco Technology, Inc.

Inventor： Jigar Parekh ,  Satyajit Das ,  Prithvi Sharan ,  Laxmikantha Reddy Ponnuru

IPC: H04L45/28 ,  H04L41/06

CPC classification number: H04L45/28 ,  H04L41/06

Abstract: In one embodiment, a method includes determining, by a network node, that a first plurality of tunnel interfaces resides in a core region of a network and determining, by the network node, that a second plurality of tunnel interfaces resides in an access region of the network. The method also includes configuring, by the network node, a first tunnel interface as a core regional fallback path for the core region of the network and configuring, by the network node, a second tunnel interface as an access regional fallback path for the access region of the network.