Title: Designing A New Routing Simulator for DiffServ MPLS Networks
Abstract: In this paper, we present the design and implementation
of a new routing simulator called Extended QoS_based Routing Simulator
(EQRS). EQRS is a discrete-event simulator developed for studying constraint
based routing in the Internet. It is an upgraded version of QRS – QoS_based
Routing Simulator [1]. Our objective in this version is to provide new
capabilities that enable simulating DiffServ MPLS networks. EQRS allows
users to configure parameters of DiffServ MPLS networks, where the dynamics
of constraint based routing algorithms as well as traffic engineering mechanisms
can be investigated. Particularly, with the help of EQRS, we investigate
the performance and cost of QoS routing under a QoS routing algorithm and
a specific link state update (LSU) algorithm. The simulation results prove
that: 1) QoS routing acheives better network performance under careful
configuration; 2) the simulator is suitable for modeling, designing and
evaluating DiffServ MPLS networks.