Dear Nina, Massimo and Stephen My name is Marco Polverini, an assistant professor at Sapienza University of Rome. I would like to submit the following proposal to be presented at the next MAT WG. This work has been accepted to be presented at the IEEE NOMS 23 ( https://noms2023.ieee-noms.org/). Attached to this email you can find the original paper (in case you need further details about the topic of the presentation I would like to do). Thanks Marco *Title:* A Digital Twin based Framework to Enable "What-If" Analysis in BGP Optimization *Outline of the speech:* - introduction and motivation: in this talk we aim to introduce a framework for the creation of Digital Twins of Autonomous Systems in order to enable the execution of "what if" analysis in the context of inter domain routing optimization - background on digital twins: this section is to introduce the basic terminology and concepts on Digital Twins - presentation of the proposed framework: in this section we provide an overview of the architecture of the proposed framework and detail the responsibilities of each functional block - proof of concept: a simple proof of concept is presented, with the aim of showing the effectiveness of the proposal - conclusion and future work *Abstract:* Nowadays, inter domain routing optimization is performed based on the so called "Tweak and Pray" approach, which consists in performing changes in the configuration of the BGP protocol without knowing in advance the consequences of such a modification. This is due to the lack of cooperation among Network Operators in the configuration of the BGP to optimize the inter domain routing. Inefficiency in the resource usage, network anomalies and outages are common consequences of wrong configuration changes performed by Network Operators in an attempt to improve the performance of their infrastructures. In this paper we propose a novel framework based on the Digital Twin technology to enable the execution of "what-if" analysis in the context of Traffic Engineering performed by tuning BGP parameters. Such a paradigm shift will allow Network Operators to be aware of the effects of BGP configuration changes before their actual execution. A proof of concept related to the balancing of inbound traffic in an Autonomous System network, based on the use of the AS Path Prepending technique, is realized to validate the feasibility of the proposed approach.