Arista Networks, Inc.

Vmware, Inc.

Gagandeep Singh Arneja

Andre Pech

Justin Costa-Roberts

Hua Zhong

Arturo Escaip

Kinshuk Govil

Aparna Sushrut Karanjkar

Thejesh Ajjikariappla Panchappa

Chandrashekhar Appanna

Gregory Hutchins

Padmanabh Ratnakar

Rajshekhar Biradar

Naveen Kumar Devaraj

Vijay Rangarajan

Charanjith Kunduru

Patrick Tullmann

Swathi Koundinya

Karthik Subraveti

A method for managing a network by a network monitoring system, wherein the network comprises a plurality of network devices, the method comprising receiving, by the network monitoring system, in-band network telemetry (INT) data from a network device of the plurality of network devices, updating a latency model of the network using the INT data to obtain an updated latency model, identifying a congestion point in the network using the updated latency model and at least a portion of the INT data, validating the congestion point; and initiating a remediation action based on the validation.

Method and system for congestion detection and validation in a network

A cluster data replication system includes a plurality of network elements and controllers. The controllers form a cluster that is able to elect one of the controllers as a master controller with the others being follower controllers. The elected controller updates, responsive to being elected the master controller, state information in a system database of the elected controller to indicate that the elected one of the controllers is the master controller. The master controller includes one or more objects that are enabled in reaction to the state information, and which coordinate replication of changes to the data, system database, and state information from the master to the follower controllers. Each follower controller includes one or more objects able to, in reaction to the state information, disable initiation of the replication of changes to the data, system database and state information by the one or more objects in each follower controller.

Cluster data replication

Systems and methods for automatically configuring network elements for in-band telemetry are disclosed. A controller of a configuration engine, which includes a flow analyzer and an INT configuration module, receives sampled packets and flow updates from network elements that are not yet configured for INT telemetry. The controller forwards the packets to the flow analyzer that extracts flow properties from the received packets, generates a flow summary along various metrics, and records it in a multi-dimensional matrix. A few metrics from top flows are selected and forwarded to the INT configuration module to identify network elements from whom packets containing the selected metrics were received. The identified network elements are automatically configured with the selected INT configuration such that INT telemetry data can be collected from them. Changes to the flow are dynamically accommodated by reconfiguring the network elements based on the telemetry data received after they have been configured.

Dynamic profile guided network telemetry configuration

A facility to determine if performance issues between two host computers in a data network includes a central controller identifying endpoints of a flow path between the two hosts. The central controller communicates with endpoint network devices to initiate telemetry tagging traffic on the flow path. A collector receives telemetry communicated in a packet from network devices on the flow path. A network operator can view the collected telemetry to assess whether the performance issue is in the network or not.

Distinguishing network vs server issues when diagnosing application performance problems

A cluster file replication system is provided. Each controller of the plurality of controllers is configured to access a filesystem having a plurality of files including a system database of a controller having state information of the plurality of controllers. Each controller is further configured to have one or more service agents. The one or more service agents of each controller is configured to respond to one of the plurality of controllers becoming a master controller of the cluster. The one or more service agents of each controller is configured to set up one or more objects that react to the state information and coordinate replication of changes to the files, system database and state information from the master controller to follower controllers in the cluster. The one or more objects on each of the follower controllers is supportive of the follower controllers receiving the changes but disabled from initiating the replication. A method for cluster file replication is also provided.

Cluster file replication

A method includes receiving a single request to configure a continuous route tracer (CRT) between a first plurality of network devices and a second plurality of network devices and configuring, by a processing device of a control server, the CRT between the first plurality of network devices and the second plurality of network devices. The method further includes receiving a plurality of probe reports corresponding to a plurality of CRT probes sent between the first plurality of network devices and the second plurality of network devices and analyzing the reports to detect one or more anomalies corresponding to a network comprising the first plurality of network devices and the second plurality of network devices. The method further includes providing the one or more anomalies for display.

System for network event detection and analysis

A method and apparatus to bring up a network controller in a network of multiple network elements is described. In an exemplary embodiment, the network controller receives an indication that the network controller is booting up. The network controller is coupled to a plurality of network elements in a network, where the network controller maintains a controller database that supports a network-wide service used by the plurality of network elements. The network controller further receives state information from the plurality of network elements. In addition, the network controller builds the controller database from the state information. Furthermore, the network controller sends updates from the controller database to each of the plurality of network elements, where each of the plurality of network elements incorporates these updates into a respective network element database and the network element database is used to perform the network-wide service.

System and method of a graceful reboot of a network controller

A method for high-availability operation is provided. The method includes communicating state information from each of a plurality of network elements to at least a first master network controller. The method includes communicating transformed state information from the first master network controller to the plurality of network elements and to each of a plurality of follower network controllers. The method includes continuing the high-availability operation with a new master network controller selected from among the plurality of follower network controllers as a failover, using the transformed state information in the new master network controller and in the plurality of network elements, responsive to a failure of the first master network controller. A network controller system is also provided.

High-availability network controller

In one approach, a method is described of generating an interface for an operating system kernel. The method calls for creating an input file, where the input file includes a node structure for the interface. A kernel component of the interface is generated from the input file. A user space component of the interface is also generated from the input file.

Growing community of inventors

San Francisco, CA, United States of America

Gagandeep Singh Arneja