Avaya Configuring IP Multicasting Services Manual de usuario Pagina 128

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Configuring IP Multicasting and Multimedia Services
8-2 117355-A Rev. A
About Line Resource Reservation
Emerging real-time multicast applications for digitized voice and video (such as
multimedia conferencing and virtual reality) require a level of consistent network
service that routers cannot meet using simple first-in-first-out (FIFO) queuing
mechanisms. The existing best-effort delivery service of IP networks, where
variable queuing delays and data loss due to congestion are acceptable, is not
sufficient.
Resource reservation protocols such as RSVP address the requirements of
delay-sensitive applications by distributing information among routers to achieve
a guaranteed quality of service (QoS) for specific packet streams (flows).
By reserving bandwidth for QoS requests, a system of line resource reservation
can meet the demands of real-time applications and maintain bandwidth for other
traffic.
Bay Networks line resource reservation supports bandwidth guarantees only. It
does not support delay guarantees.
Resource Manager
The Bay Networks Resource Manager lets you define a certain percentage of a
line’s bandwidth as reservable. Applications that require a guaranteed QoS can
negotiate for the reservable bandwidth. When the router honors a reservation
request, the Resource Manager allocates bandwidth from the reservable
bandwidth, reducing the bandwidth available for other requests.
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