Troubleshooting for Network Operators

5Temporary Remediation: SDN-based Application-aware Segment Routing for Large-scale Networks

“The Internet is not just one thing”

James H. Clark

Chapter 5 presents a QoE-based application-aware segment routing in the SDN environment for encrypted traffic. This approach is implemented in the temporary remediation module, which is briefly depicted as in Figure 2.2.

5.1. Introduction

According to related work (Fonseca and Mota 2017; Yu et al. 2018), there are many remediation approaches including load balancing, routing, etc. Moreover, many studies have proven the performance of routing in problem remediation (Kim et al. 2016; Jurkiewicz et al. 2020). Therefore, we consider an application-aware routing in the temporary remediation module. The application-aware routing, which implements different kinds of routing policies corresponding to differentiated applications, can overcome this drawback. To facilitate the application-aware routing, two requirements related to a routing technique supporting traffic engineering and a network architecture that can obtain a global view of network need to be met.

For the first requirement, multi-protocol label switching (MPLS) is a potential solution deployed by network operators to improve their IP networks. However, MPLS contains three main drawbacks (Ventre et al. 2020; Abdullah et al. 2018). Firstly, it requests an IP network to maintain an explicit state at network nodes along an MPLS path, bringing a scalability problem in both the control ...