A Review of Scalability Issues in Software-Defined Exchange Point (SDX) Approaches: State-of-the-Art

Abdijalil Abdullahi,Shankar Karuppayah,Selvakumar Manickam

doi:10.1109/access.2021.3069808

Abdijalil Abdullahi, Shankar Karuppayah + Show 1 more

Open Access

https://doi.org/10.1109/access.2021.3069808

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Journal: IEEE Access	Publication Date: Jan 1, 2021
Citations: 2	License type: CC BY 4.0

Affiliation: Universiti Sains Malaysia

Abstract

Internet Exchange Points (IXPs) interconnect heterogeneous networks and transfer substantial traffic volumes. In the past decade, the number of IXPs has seen tremendous growth, with more operators connecting to these IXPs even though these IXPs faced various inter-domain routing limitations. Routers based on Border Gateway Protocol (BGP) forwards packets only based on destination IP prefix and selects only routes learned from their neighbors. IXPs designed using Software-Defined Network (SDN), called SDX, offer solutions for existing inter-domain routing problems. This paper presents the existing scalability limitations of inter-domain routing at IXP and how traditional IXP structural design can be transformed into a highly scalable SDX design by exploiting the SDN platform’s functionalities in different use cases of SDX. The paper then reviewed how the SDX improved various IXP operators’ scalability by reviewing and analyzing the latest SDX models and approaches, which provide enhanced policies to enhance providers’ management operations and offer good quality of services (QoS) to the various participating members. Finally, we discussed the open issues and challenges in this area that need further study and a solution to tackle them.

Highlights

The Internet is divided into autonomous systems, i.e., Autonomous Systems (ASes)
This paper discusses the improvement of scalability of Internet exchange points by exploiting Software-Defined Network (SDN) functionalities to enable Internet Exchange Points (IXPs) operators to advance their capabilities and manageability to provide good services into their member networks
2) DECOUPLING SDN AND Border Gateway Protocol (BGP) FORWARDING In the former Software-Defined Exchange Point (SDX) designs, the SDN and BGP policies computes collectively that causes increasing the amount of forwarding table entries and making recompilation of forwarding table entries if any change of BGP routing occurs affect the cost of the operation

Summary

INTRODUCTION

The Internet is divided into autonomous systems, i.e., ASes. Each AS is under a specific administrative domain that manages and responsible for its operations. Internet providers relied upon inefficient mechanisms such as AS path prepending, communities, selective announcements, local preferences, and others to manage traffics, prevents attacks, and identify peering agreements These shortcomings come from inter-domain routing protocol behavior. This paper discusses the improvement of scalability of Internet exchange points by exploiting SDN functionalities to enable IXP operators to advance their capabilities and manageability to provide good services into their member networks. We analyze how these approaches are changed the way IXP operators provide the services into different autonomous systems They implemented several policies that enhanced the manner of inter-domain routing, especially the BGP protocol route, and forward the packets in the network domain. It demonstrates the different studies that talked about these aspects by showing ‘‘Y’’ means yes and ‘‘N’’ means no

DEVELOPMENT IN IX

ENDEAVOUR

Findings

CONCLUSION