Pensando Systems Inc.

Cisco Technology, Inc.

Akshaya Nadahalli

Balakrishnan Raman

Krishna Doddapaneni

Sarat Kamisetty

Pirabhu Raman

Prabu Thayalan

Rathina Sabapathy Sabesan

Dontula Venkata Ratnananda Ganesh

Carlos M Pignataro

Manoj N Kumar

Frank Brockners

Shwetha Subray Bhandari

Zafar Ali

Vipin Jain

Varagur Chandrasekaran

Gabriele Maria Galimberti

Manoj Kumar

Vijay Sampath

Maruthi Ram Namburu

John Cruz

Antonello Bonfanti

Chandrasekaran Swaminathan

Arun Selvarajan

A networking device can use sync request packets to synchronize connection objects with a peer. Real or virtual flow misses occurring in the data plane while processing a network packet indicate that synchronization is needed. A virtual flow miss occurs when a data plane connection object is obsolete. A sync request packet containing connection metadata and the network packets is sent to the peer. The peer uses the connection metadata to create or update its version of the connection object then returns a sync ack packet that contains the network packet. Receiving a sync ack packet can indicate that the locally stored version of the connection object and the peer's version of the connection object are consistent. The network packet may be processed normally when the locally stored version of the connection object and the peer's version of the connection object are consistent.

Systems and methods for flow configuration syncing between network infrastructure devices

HA peers can include networking devices that have data planes and control planes that configure the data plane to use status data in a memory for processing network packets of network flows. The HA peers synchronize the status data such that one peer can take over when another fails. When a HA peer is brought up, data plane syncing synchronizes data for new network flows but not existing network flows. A first bulk sync operation synchronizes data for existing flows but not for new flows. A second bulk sync operation can synchronize the data for flows that changed state during the first bulk sync operation. Data plane syncing can sync data for all flows after the first bulk sync operation.

Systems and methods for high availability node pairing without incurring connection drops

Synchronizing the databases maintained by network appliances can support high availability or high throughput topologies, but also consumes the devices' processing resources. To address that resource consumption, the network appliance's packet processing pipeline circuits can process synchronization packets to thereby synchronize the databases. A local data structure can be in a first local state. Processing a network packet can result in changing the local data structure to a second local state. A state sync packet can include state transition data that indicates a state difference between the first local state and the second local state. The state sync packet can be sent to a peer device that is configured to process the state transition data using the peer device's packet processing pipeline circuit. The peer device's packet processing pipeline can use the state transition data to update a peer device data structure that is in the peer device.

Methods and systems for distributed high speed state synchronization

A method provided that is performed at one or more intermediate nodes in a path in a network. The node receives a packet having a header that includes metadata that has been accumulated as the packet travels along the path in the network. The node detects whether a trigger condition has occurred. In response to detecting that the trigger condition has occurred, the node exports, to a destination entity, at least a portion of the metadata that has been accumulated in the header so that the portion of the metadata is removed from the header after it has been exported.

In-band metadata export and removal at intermediate nodes

A method is disclosed for use by a network element coupled with an optical transport network. The method comprises calculating an optical path from a first packet-terminated optical interface of the network element to a second packet-terminated optical interface of a destination network element coupled with the optical transport network, and signaling the optical transport network to create the optical path. The method further comprises creating an Ethernet interface corresponding to the first packet-terminated optical interface, and adding the Ethernet interface to an Ethernet bundle interface. The method further comprises communicating across the optical path using addressing of the Ethernet bundle interface.

Transparent deployment of packet services using optical transport network

Growing community of inventors

Bengaluru, India

Akshaya Nadahalli