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INTSERVIntegrated Services
INTSERVIntegrated Services Model
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2013) In the commonly used QoS models, the RSVP and IntServ have the disadvantages of poor scalability and high routing load.
IntServ is a very rich system ranging from default, nonguaranteed services to guaranteed delivery of specified volumes of data with specified delay and loss rates.
Currently, investigations have already been made between these two architectures, evaluating loss and delay as outlined in the publication of the Universal Multiservice Networks magazine titled "Mapping of loss and delay between intserv and diffserv" [4] [1] this has generated the motivation to conduct a study based on said previous research where variables such as jitter, delay, throughput and losses are evaluated through NS2 simulation on a proposed topology.
1998), una de las motivaciones primarias para el trabajo de la IETF con Diffserv fue idear mecanismos alternativos para diferenciacion de servicios en la Internet, que atenuara los problemas de escalabilidad encontrados con el modelo Intserv.
IntServ provee QoS a traves de la reserva de recursos a lo largo del camino de datos, antes de iniciar la transmision de los paquetes.
This QoS could be enabled locally, in each domain, by the use of a QoS model such as IntServ and DiffServ, and extended to the end-to-end level.
12min PON OC 48/32 (80Mb/s) 18min Etherent 100 10min GbE 1min 10GbE(UBB) 6secs Source: Tim Holloway, World Wide Packets presentation, FTTH conference, November, 2002 Figure 2--QoS mechanisms before and after UBBism Telecomism UBBism Intserv small-scale Stateless networks RSVP Diffserv End to end and * No time consuming flow peering problems * Easy to implement Packets dropping * More capacity will resolve any issues MPLS-TE Additional layer Improve scalability and Cost of router interoperability enabling support of different services
IntServ presenta problemas de escalabilidad cuando se implemente en el nucleo de la red, debido a que requiere la reservacion de recursos en cada dispositivo del trayecto para cada comunicacion que se establezca.
Moreover, technologies such as IntServ and MPLS, both of which are