Cisco Technology, Inc.

Cisco Systems Inc.

Andiamo Systems

Scott S. Lee

Thomas J. Edsall

Dinesh G. Dutt

Cisco Technologies, Inc.

Thomas James Edsall

Silvano Gai

Chih-Tsung Huang

Kit Chiu Chu

Dinesh Ganapathy Dutt

Satyam Sinha

Navindra Yadav

Wei-Jen Huang

Mohammadreza Alizadeh Attar

Francisco M Matus

Krishna Doddapaneni

Raymond Kloth

Sarang M Dharmapurikar

Luca Cafiero

Sameer Merchant

Davide Bergamasco

Putu Harry Subagio

Alessandro Fulli

Soei-Shin Hang

Umesh Mahajan

Michael Fine

Mingzhe Li

Christopher A Wildman

Yichou Lin

Rong Pan

Subrata Banerjee

Dennis Khoa Dang Nguyen

Parvin Taheri

Janakiramanan Vaidyanathan

Yue J Yang

Samar Sharma

Ramana Mellacheruvu

Sanjaya Kumar

Sha Ma

Ankur Jain

Ray Kloth

Kelvin Chan

Flavio Giovanni Bonomi

Elango Ganesan

Kalyan Ghosh

Lawrence Rolfe Kreeger

Smita Rai

Karl S Nakamura

Maurilio Tazio De Nicolo

Ravikanth Nasika

Ashutosh Agrawal

Ganga Sudharshini Devadas

Scott S Lee

Erico Vanini

Bruno Raimondo

Michael R Smith

Ronak K Desai

Dino Farinacci

Ayan Banerjee

Andreas V Bechtolsheim

Maurilio Cometto

Howard M Frazier

Umamaheswararao Karyampudi

Varagur Chandrasekaran

Marco Foschiano

Ajit Sanzgiri

Gaurav Rastogi

Saravanakumar Rajendran

Keerthi Manjunathan Swarnamanjunathan

Murukanandam Kamalam Panchalingam

Arthur Lin

Wanli Wu

Thomas John Nosella

Daniel R Ullum

Herman Levenson

Geetha Anandakrishnan

Muralidhar Annabatula

Junyun Li

Tuan Thanh Nguyen

Badrinarayanan Ramaswamy

Rajeev Bhardwaj

Liangi Lin

Matthew Cressa

Jeff Hill

Tauseef Hashmi

Rong-Lung Lue

Keith McCloghrie

Sanjay Sane

Frederick Roland Schindler

Murali Basavaiah

James P Rivers

Claudio Desanti

David Walker

Jonathan Davar

Madhava Rao Cheethirala

Guglielmo Marco Morandin

Georges Akis

Valentina Alaria

Dante Malagrino

Joy J Chatterjee

Vinay Gaonkar

Prashant Billore

Roy D'Cruz

Sandeep Arvind Patel

Christina Hien Tran

In accordance with one embodiment, a source leaf device receives a packet. The source leaf device identifies a flowlet associated with the packet and a destination leaf device to which the packet is to be transmitted. The source leaf device may determine whether the flowlet is a new flowlet. The source leaf device may select an uplink of the source leaf device via which to transmit the flowlet to the destination leaf device according to whether the flowlet is a new flowlet. The source leaf device may then transmit the packet to the destination leaf device via the uplink.

System and method for multi-path load balancing in network fabrics

Disclosed herein are methods of forwarding data over an IP network. The methods may include receiving a packet from a source host connected to the IP network, identifying the IP address of a destination host designated in the packet, determining the location on the IP network where the destination host designated by the packet is connected, without reference to the MAC address specified in the packet, by using location-identification information stored on the IP network, and forwarding the packet to the location on the IP network where the destination host is connected without reference to the MAC address specified in the packet. Also disclosed herein are related network devices implementing such techniques and operations, as well as IP networks which include such network devices.

IP-based forwarding of bridged and routed IP packets and unicast ARP

Techniques are presented herein to facilitate the monitoring of occupancy of a buffer in a network device. Packets are received at a network device. Information is captured describing occupancy of the buffer caused by packet flow through the buffer in the network device. Analytics packets are generated containing the information. The analytics packets from the network device for retrieval of the information contained therein for analysis, replay of buffer occupancy, etc.

Exporting real time network traffic latency and buffer occupancy

Techniques are presented herein to facilitate latency measurements in a networking environment. A first network device receives a packet for transport within a network domain that comprises a plurality of network devices. The plurality of network devices have a common time reference, that is, they are time synchronized. The first network device generates timestamp information indicating time of arrival of the packet at the first network device. The first network device inserts into the packet a tag that comprises at least a first subfield and a second subfield. The first subfield comprising a type indicator to signify to other network devices in the network domain that the tag includes timestamp information, and the second subfield includes the timestamp information. The first network device sends the packet from to into the network domain to another network device. Other network devices which receive that packet can make latency measurements.

Timestamping packets in a network

The subject technology addresses a need for improving utilization of network bandwidth in a multicast network environment. More specifically, the disclosed technology provides solutions for extending multipathing to tenant multicast traffic in an overlay network, which enables greater bandwidth utilization for multicast traffic. In some aspects, nodes in the overlay network can be connected by virtual or logical links, each of which corresponds to a path, perhaps through many physical links, in the underlying network.

Multicast multipathing in an overlay network

A distributed policy proxy system offloads network policy processing from an overloaded network element to policy proxy network elements. A network controller detects that policy resources are overloaded at a network element, and assigns a range of endpoints to each policy proxy network element. Each policy proxy network element is assigned to handle policy processing for traffic belonging to a corresponding assigned range of endpoints. The network controller provides instructions to the policy proxy network elements to enable each policy proxy network element to apply the network policy for its assigned range of endpoints. The network controller also provides instructions to the overloaded network element to redirect a packet from the first endpoint to a first policy proxy network element based on a destination of the packet.

Distributed policy enforcement proxy with dynamic EPG sharding

A first node of a packet switched network transmits at least one flow of protocol data units of a network to at least one output context of one of a plurality of second nodes of the network. The first node includes X virtual output queues (VOQs). The first node receives, from at least one of the second nodes, at least one fair rate record. Each fair rate record corresponds to a particular second node output context and describes a recommended rate of flow to the particular output context. The first node allocates up to X of the VOQs among flows corresponding to i) currently allocated VOQs, and ii) the flows corresponding to the received fair rate records. The first node operates each allocated VOQ according to the corresponding recommended rate of flow until a deallocation condition obtains for the each allocated VOQ.

Managing virtual output queues

Aspects of the subject disclosure relate to methods for detecting a link failure between the first network device and a destination node, receiving a data packet addressed to the destination node, and rewriting encapsulation information of the first data packet. Subsequent to rewriting the encapsulation information of the first data packet, the first data packet is forwarded to a second network device (e.g., using updated address information in the packet header), wherein the second network device is paired with the first network device in the virtual port channel. In certain aspects, systems and computer readable media are also provided.

Virtual port channel bounce in overlay network

A network device, including ports that receive/send data packets from/to a network, receives data packets of multiple traffic flows, and populates a queue in memory with the data packets. The network device periodically updates a fair rate for the multiple traffic flows to converge a length of the queue to a reference length. Specifically, the network device determines a length of the queue, a change in the length from a previous length, and a deviation of the length from the reference length. The network device detects an increase in the change in length above a threshold that is based on the reference length. If the increase is not above the threshold, the network device derives the fair rate from a previous fair rate using proportional integral control. The network device identifies elephant flows among the multiple traffic flows, and sends the fair rate to a source of each elephant flow.

Layer 3 fair rate congestion control notification

A distributed policy proxy system offloads network policy processing from an overloaded network element to policy proxy network elements. A network controller detects that policy resources are overloaded at a network element, and selects a group of policy proxy network elements. The network controller assigns an exclusive range of endpoint groups to each policy proxy network element. Each policy proxy network element is assigned to handle policy processing for its assigned range of endpoint groups. The network controller provides instructions to the policy proxy network elements to enable each policy proxy network element to apply the network policy for its assigned range of endpoint groups. The network controller also provides instructions to the overloaded network element to redirect a packet from the first endpoint group to a first policy proxy network element based on a destination of the packet.

Growing community of inventors

Los Gatos, CA, United States of America

Thomas James Edsall