Hasan Redzovic

University of Belgrade, Faculty of Electrical Engineering, Resarche of Internet Tehnology, Faculty Member

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B. Harun Küçük

University of Pennsylvania

Marisol de la Cadena

University of California, Davis

Christopher Witmore

Texas Tech University

Armando Marques-Guedes

UNL - New University of Lisbon

Carlos B Westphall

Universidade Federal de Santa Catarina - UFSC (Federal University of Santa Catarina)

Nikos Komninos

City, University of London

Fatiha Djemili Tolba

Badji Mokhtar - Annaba University

Roshan Chitrakar

Nepal College of Information Technology

Lev Manovich

Graduate Center of the City University of New York

Benny Nyambo

University of Zimbabwe

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Papers by Hasan Redzovic

Application of huge pages to the netmap platform

2017 25th Telecommunication Forum (TELFOR)

The netmap platform has been designed to support fast exchange of packets between user applicatio... more The netmap platform has been designed to support fast exchange of packets between user applications and the external world. Hardware of powerful servers can support multiple 10 Gb/s ports, but, the software cannot process shortest packets at such high throughputs even when it utilized the netmap platform. Such performance indicates that there is a room for improvements of the netmap platform. Translation of virtual memory addresses to physical memory addresses might be one of bottlenecks that slow down packet processing. This translation can be simplified and sped up by utilization of huge pages, as their number is smaller. In this paper, we will explore improvements that can be achieved by utilization of huge pages within the netmap based applications. We will demonstrate that the significant packet rate increase can be achieved by utilization of huge pages.

Fast Quagga Data Plane Based on Netmap Platform

2018 IEEE 19th International Conference on High Performance Switching and Routing (HPSR), 2018

In this paper, we are presenting improvement of packet forwarding throughput reached by Quagga so... more In this paper, we are presenting improvement of packet forwarding throughput reached by Quagga software routers. Usually, software routers that operate on general purpose hardware have moderate data plane performance compared to routers using dedicated hardware. Quagga software router relies on kernel network stack for forwarding packet between ports. The kernel network stack is composed of complex code which is not optimized for high packet forwarding throughput. We integrated Quagga control plane with fast data plane which is based on the netmap platform. Redesigned data plane provides much higher packet forwarding throughput, which is increased by the order of magnitude for shortest packets.

Traffic modelling challenges on 10 Gbit/s links using netmap platform

Telfor Journal, 2019

Network devices are using a growing number of 10 Gbit/s links. Such throughput upgrade imposes ne... more Network devices are using a growing number of 10 Gbit/s links. Such throughput upgrade imposes new challenges on creating high-speed packet generators that can provide real network conditions. Traffic generators implemented as software solutions have challenges in achieving a required performance, as they are commonly using a kernel network stack for packet I/O. We describe different techniques for implementing the Poisson and on-off traffic model in a software-based traffic generator that is using netmap API as fast packet I/O.

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High-Capacity FPGA Router for Satellite Backbone Network

IEEE Transactions on Aerospace and Electronic Systems, 2019

Satellite backbone networks provide a viable means of establishing broadband connectivity for rem... more Satellite backbone networks provide a viable means of establishing broadband connectivity for remote, sparsely populated areas. In addition, satellite communication systems are well suited for airborne, maritime, and disaster relief environments. Technologies for links are continuing to improve in performance and power efficiency, making onboard regeneration and routing feasible within spacecraft power envelope. In this article, we implement and analyze a spaceborne router design integrated on a field-programmable gate array (FPGA). FPGA provides a flexibility needed to circumvent space radiation effects on chip circuitry, as they can be reconfigured at runtime. We explored scalability of the high-end state-of-the art FPGA chip family, and its ability to support high bit-rate satellite links: 10 Gbps satellite-to-ground links and 100 Gbps intersatellite links. Through implementation and testing, we confirm that the current FPGA technology can support space routers with very high data throughput.

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Implementation of RSVP protocol in Quagga software

Telfor Journal, 2019

Multimedia applications are already most popular on the Internet, and they are much better served... more Multimedia applications are already most popular on the Internet, and they are much better served with bandwidth and delay guarantees. Providing support for multimedia applications over the Internet is a difficult task because they require more bandwidth than standard applications. Aside from that, multimedia applications are real time so it is essential to guarantee certain capacity. RSVP protocol provides the basic quality of service on the Internet such as bandwidth reservations. This paper presents implementation of RSVP protocol that supports basic functionalities in Quagga Routing Suite software. Our implementation is meant to serve as a base for adding new functionalities. We have used modern concept of virtualization to provide environment for testing. In this paper, we present implementation and routing of Resv messages. Resv messages are routed based on IP lookup that uses the longest prefix matching. We validated our RSVP implementation through its testing in virtual environment. Guidelines for future improvements and upgrades to RSVP-TE protocol are recommended.

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Performance evaluation of Software Routers with VPN features

2016 24th Telecommunications Forum (TELFOR), 2016

This paper presents implementation and analysis of the VPN software router which is based on Quag... more This paper presents implementation and analysis of the VPN software router which is based on Quagga and strongSwan open-source software tools. We validated the functionalities of strongSwan and Quagga in realistic environment which include scenarios with link failures. Also, we measured and analyzed the performance of encryption and hash algorithms supported by strongSwan software, in order to advise an optimal VPN configuration that provides the best performance.

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OSPF – Prisećanje OSPF je LSP (Link State Protocol

Application of huge pages to the netmap platform

2017 25th Telecommunication Forum (TELFOR)