Network design with guaranteed End-to-End QoS
Author
Gercheva, Radostina Stefanova
Term
4. term
Publication year
2013
Submitted on
2013-06-06
Pages
99
Abstract
Denne afhandling adresserer, hvordan man designer en skalerbar netværksarkitektur med garanteret end‑to‑end kvalitet (QoS) på tværs af adgangs-, aggregerings- og kernenet, i lyset af konvergensen mod Ethernet-baserede IP/MPLS-net og kravene fra mobil backhaul og migration fra 2G/3G til LTE. Arbejdet indleder med en gennemgang af state of the art, herunder MPLS i Mobile Backhaul-initiativet, migrationsscenarier, trafikklassificering og selvorganiserende netværk. Herefter udvikles og verificeres to evalueringsarkitekturer: en ren IP-model og en IP/MPLS-baseret model, der anvender mekanismer som RSVP‑TE og label-switched paths, L2/L3 VPN, hurtig omskiftning (fast reroute), make‑before‑break samt QoS/CoS-baseret planlægning med DSCP/TOS. Dynamiske routingprotokoller (OSPF og BGP) konfigureres, og der opbygges et laboratoriemiljø med Juniper MX960 og SRX210, suppleret af trafikgenerator og testudstyr, til at måle protokoladfærd, ydeevne, forsinkelse og QoS-egenskaber. Afhandlingen beskriver konfigurationstrin for OSPF, MPLS, RSVP‑TE og BGP, etablering af L3VPN-tjenester samt QoS-funktioner (CBF, scheduler‑maps), og den sammenligner den rene IP-arkitektur med IP/MPLS-modellen. Resultater præsenteres senere i afhandlingen og omfatter evaluering af netværksydelse, protokollers funktion og verifikation af QoS og latenstid; detaljerede fund fremgår ikke af dette uddrag.
This thesis investigates how to design a scalable network architecture that guarantees end‑to‑end quality of service (QoS) across access, aggregation, and core domains, motivated by the industry shift toward Ethernet-based IP/MPLS networks and the requirements of mobile backhaul and the migration from 2G/3G to LTE. It begins with a state‑of‑the‑art review covering MPLS in Mobile Backhaul, migration scenarios, traffic classification, and self‑organizing networks. Two evaluation architectures are then designed and validated: a plain IP model and an IP/MPLS model that leverages RSVP‑TE and label‑switched paths, L2/L3 VPNs, fast reroute, make‑before‑break, and QoS/Class of Service scheduling using DSCP/ToS. Dynamic routing (OSPF and BGP) is configured, and a lab environment with Juniper MX960 and SRX210 devices, plus a traffic generator and test modules, is used to measure protocol behavior, performance, delay, and QoS characteristics. The thesis details configuration steps for OSPF, MPLS, RSVP‑TE, and BGP, the setup of L3VPN services, and QoS features (CBF, scheduler maps), and compares the plain IP architecture with the IP/MPLS model. Results—reported later in the document—cover performance evaluation, protocol operation, and verification of QoS and latency; specific outcomes are not provided in this excerpt.
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