IPv6 e coesistenza con IPv4

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DEPLOYMENT OF NATIVE IP MULTICAST ROUTING SERVICES ON THE ITALIAN ACADEMIC AND RESEARCH NETWORK

In 1993 the GARR (Italian Academic and Research Network) was connected to MBONE (worldwide IP multicast enabled network backbone). Since then, and especially in the last few years, this network has been used to test and develop new IP multicast routing protocols and applications. However it was a tunnel-based solution, not suitable for taking advantage of the new potential of IP multicast nor for use by a large community. This paper describes the work done for a migration to a native IP multicast routing deployment, highlighting the solutions adopted when dealing with the implementation problems and the complex wide area network management. The aim of this work is also to ensure a native IP multicast connection with the other Research Networks and the rest of Internet

Rete GARR-B: Piano di routing IP multicast

The IP multicast was introduced in the GARR network (Italian Network for University and Scientific Community) in 1993 with the connection to Mbone (worldwide virtual multicast network). Since then the Italian Mbone developed constantly allowing the test of protocols and applications. Nevertheless the original Mbone structure is not suitable for an efficient utilization of multicast potentialities and advantages, preventing from exploiting all the services on a large scale; moreover it doesn\u27t allow an interconnection with those ISP which are enabling multicast in their networks but with different technical solutions. This document, after a description of the limits of the present Mbone on GARR, proposes the steps for an updating plane: - IP multicast implementation on the production routers of the backbone, using the PIM-SM protocol; - choice and configuration of the Rendez-Vous Points; - definition of IP multicast boundary routers; - bandwidth limitation; - inter-domain routing (MSDP and MBGP); - international multicast connections. The document deals with some of IP multicast management tools, as well.L\u27introduzione del multicast IP sulla rete GARR (Rete per l\u27Universit? e la Ricerca Scientifica Italiana) risale al 1993 con la prima connessione a Mbone (rete virtuale multicast mondiale). Da allora c\u27e\u27 stato un costante sviluppo sulla Mbone italiana che ha reso possibile la sperimentazione di protocolli e applicativi. Tuttavia la struttura originaria di Mbone non consente un utilizzo efficace delle potenzialita\u27 e dei vantaggi del multicast, precludendo la possibilita\u27 di sfruttarne appieno i servizi su larga scala; cosi\u27 come non consente l\u27interconnessione con quegli ISP che stanno gia\u27 abilitando le loro reti al multicast con soluzioni tecniche diverse. Questo documento, dopo una descrizione dei limiti dell\u27attuale Mbone sul GARR, ne propone le fasi necessarie per un piano di aggiornamento: - implementazione di IP multicast sulla dorsale sui router di produzione con protocollo PIM-SM; - scelta e configurazione dei Rendez-Vous Point; - definizione delle frontiere amministrative (boundary router); - limitazioni di banda; - inter-domain routing (MSDP e MBGP); - connessioni multicast internazionali. Il documento contiene anche un accenno ad alcuni degli strumenti utilizzabili per la gestione dell?IP multicast

Componente di Sicurezza del TIX e della Infrastruttura di RTRT - Indicazioni tecniche per le fasi di progettazione e gestione

TIX (Tuscany Internet eXchange) is a Neutral Access Point (NAP) to promote territorial connectivity cover of Tuscany region for Public Local Government that belongs to RTRT (Tuscany Data Transmission Network) Infrastructure. Starting from TIX planning analysis, we provide a description of the process to secure and protect TIX indicating strategies and methodologies to improve the security system level

TXS 0506+056 with Updated IceCube Data

Past results from the IceCube Collaboration have suggested that the blazar TXS 0506+056 is a potential source of astrophysical neutrinos. However, in the years since there have been numerous updates to event processing and reconstruction, as well as improvements to the statistical methods used to search for astrophysical neutrino sources. These improvements in combination with additional years of data have resulted in the identification of NGC 1068 as a second neutrino source candidate. This talk will re-examine time-dependent neutrino emission from TXS 0506+056 using the most recent northern-sky data sample that was used in the analysis of NGC 1068. The results of using this updated data sample to obtain a significance and flux fit for the 2014 TXS 0506+056 "untriggered" neutrino flare are reported

Recent neutrino oscillation results with the IceCube experiment

The IceCube South Pole Neutrino Observatory is a Cherenkov detector instrumented in a cubic kilometer of ice at the South Pole. IceCube’s primary scientific goal is the detection of TeV neutrino emissions from astrophysical sources. At the lower center of the IceCube array, there is a subdetector called DeepCore, which has a denser configuration that makes it possible to lower the energy threshold of IceCube and observe GeV-scale neutrinos, opening the window to atmospheric neutrino oscillations studies. Advances in physics sensitivity have recently been achieved by employing Convolutional Neural Networks to reconstruct neutrino interactions in the DeepCore detector. In this contribution, the recent IceCube result from the atmospheric muon neutrino disappearance analysis using the CNN-reconstructed neutrino sample are presented and compared to the existing worldwide measurements

Angular dependence of the atmospheric neutrino flux with IceCube data

IceCube Neutrino Observatory, the cubic kilometer detector embedded in ice of the geographic South Pole, is capable of detecting particles from several GeV up to PeV energies enabling precise neutrino spectrum measurement. The diffuse neutrino flux can be subdivided into three components: astrophysical, from extraterrestrial sources; conventional, from pion and kaon decays in atmospheric Cosmic Ray cascades; and the yet undetected prompt component from the decay of charmed hadrons. A particular focus of this work is to test the predicted angular dependence of the atmospheric neutrino flux using an unfolding method. Unfolding is a set of methods aimed at determining a value from related quantities in a model-independent way, eliminating the influence of several assumptions made in the process. In this work, we unfold the muon neutrino energy spectrum and employ a novel technique for rebinning the observable space to ensure sufficient event numbers within the low statistic region at the highest energies. We present the unfolded energy and zenith angle spectrum reconstructed from IceCube data and compare the result with model expectations and previous measurements

Galactic Core-Collapse Supernovae at IceCube: “Fire Drill” Data Challenges and follow-up

The next Galactic core-collapse supernova (CCSN) presents a once-in-a-lifetime opportunity to make astrophysical measurements using neutrinos, gravitational waves, and electromagnetic radiation. CCSNe local to the Milky Way are extremely rare, so it is paramount that detectors are prepared to observe the signal when it arrives. The IceCube Neutrino Observatory, a gigaton water Cherenkov detector below the South Pole, is sensitive to the burst of neutrinos released by a Galactic CCSN at a level >10σ. This burst of neutrinos precedes optical emission by hours to days, enabling neutrinos to serve as an early warning for follow-up observation. IceCube\u27s detection capabilities make it a cornerstone of the global network of neutrino detectors monitoring for Galactic CCSNe, the SuperNova Early Warning System (SNEWS 2.0). In this contribution, we describe IceCube\u27s sensitivity to Galactic CCSNe and strategies for operational readiness, including "fire drill" data challenges. We also discuss coordination with SNEWS 2.0